Make main the lean product a site receives

main was 16 days and 259 commits behind the line the product is actually built
on, at contract 0.30.0 against 0.35.0, with no per-PC credential code at all. It
was neither current nor curated - just stale. This brings it forward and, at the
same time, makes it mean something: main is what a receiving site installs, and
nothing else.

WHAT IT CARRIES. Twelve plugins - backups, computers, endpoints, guides,
knowledgebase, machines, network, notifications, printers, slides, tools,
warranty - plus applications, which is manifest-less core and always ships. The
only manifest dependency inside that set is endpoints on computers, and both are
in it, so the closure is self-contained.

WHAT IT DOES NOT. employees, geenforce, measuringtools, printedparts and usb
stay on the site line. So do the Windows installer tree, the VM rehearsal
helpers, the agent tooling config, one site's data loader, the internal audit
and findings records, and the planner spreadsheet. 1,135 tracked files against
1,438.

A REMOVAL THAT BREAKS THE APP IS NOT A REMOVAL, and two nearly shipped:

deploy/site-profile-universal.json still named all seventeen plugins. It is the
file docs/DEPLOY.md tells a site to provision from, so a fresh install would
have failed at `flask plugin apply-profile` with PluginError - the first thing a
receiving site does, broken by the branch meant to serve them. It now names the
twelve that exist, and its comment says the two must agree.

agent/ was never refreshed. Whoever populated this branch copied shopdb/,
plugins/, frontend/ and tests/ from the site line and left the agent tree at its
September state: 22 C# and PowerShell sources missing, including AgentCredentials,
EnrollmentService, AgentHttpFactory and the fleet-alert client, plus one file the
site line had deleted still present. The old tree is internally consistent, so it
compiles, and nothing in CI builds it - every gate was green over a server that
speaks enrollment and per-PC credentials to a bundled agent source that cannot.
Resynced whole.

DECISIONS THIS ENCODES, rather than defers:

- The plugin-authoring lab builds printedparts, whose manifest depends on
  employees, so it could not stay. The lab remains on the site line and main
  ships no build-along tutorial. That is a real loss for an adopting developer
  and is recorded here rather than discovered later.
- Recognition, Training and Recertification notifications are no longer seeded.
  Each splits one notification into a card per employee and renders a photo,
  which needs a plugin this branch does not bundle. Seeding them would offer an
  author a type that cannot resolve anybody. A site that installs employees gets
  them from that plugin's own seed.
- Windows/IIS is documented as the legacy path throughout, and the README leads
  with Docker, because that is what a receiving site gets.

The API description is regenerated for THIS branch - 347 paths and 483
operations, down from 415 and 573 - so the published contract describes what is
here rather than what the site line serves. docs/CONFIG.md lost the two
measuring-tool label keys the code no longer declares, which two lanes had
decided opposite ways.

Suite: 3124 passed, 6 skipped. Naming and style gates pass. The docs gates run
rather than skip, and every index line count is derived from the file it names.

.env.example

@@ -4,7 +4,11 @@
 # refuses to boot when SECRET_KEY, JWT_SECRET_KEY, DATABASE_URL, or
 # CORS_ORIGINS are missing or use the dev defaults.
 #
-# See the DEPLOY wiki page for the full per-site deployment runbook.
+# This template covers what a container deploy sets. Docker is the shipping
+# path for a receiving site: docker-compose.yml builds from source,
+# docker-compose.pull.yml runs a published image, and
+# docker-compose.airgap.yml runs an image loaded from a tarball. See the
+# DEPLOY wiki page for the full per-site runbook.
 
 # ---- Flask ----
 FLASK_APP=wsgi.py
@@ -37,11 +41,12 @@ DATABASE_URL=mysql+pymysql://shopdb:CHANGE_ME@db:3306/shopdb_flask?charset=utf8m
 CORS_ORIGINS=http://localhost:5173
 
 # ---- Reverse proxy (optional, default 0 = no proxy) ----
-# Set to the number of proxies actually in front of this instance - 1 when IIS
-# or nginx serves it under a subpath such as /shopdb. Without it the app sees
-# the proxy's connection instead of the browser's (scheme http, the proxy's
-# host and IP), so any absolute URL it builds is wrong at the browser. That is
-# what made a redirect on the endpoints list unfollowable behind IIS.
+# Set to the number of proxies actually in front of this instance - 1 when
+# nginx or another front end terminates TLS for the container. Without it the
+# app sees the proxy's connection instead of the browser's (scheme http, the
+# proxy's host and IP), so any absolute URL it builds is wrong at the browser.
+# That is what made a redirect on the endpoints list unfollowable behind a
+# proxy.
 #
 # Leave it at 0 when nothing fronts the app. It makes X-Forwarded-* trusted,
 # and a client can send those headers itself - the login rate limit and the
@@ -56,15 +61,22 @@ JWT_REFRESH_TOKEN_EXPIRES=2592000
 LOG_LEVEL=INFO
 
 # ---- docker-compose only ----
-# These are read by docker-compose.yml; not used by the Flask app directly.
+# These are read by the compose files; not used by the Flask app directly.
 MYSQL_ROOT_PASSWORD=CHANGE_ME_ROOT_PASSWORD
 MYSQL_PASSWORD=CHANGE_ME_APP_PASSWORD
 MYSQL_PORT=3306
 API_PORT=5001
 # Air-gapped deploy only (docker-compose.airgap.yml): the loaded image tag,
 # which MUST match what build-offline-bundle.ps1 -Version produced. Ignored by
-# the connected build template (docker-compose.yml builds from source).
+# the connected build template (docker-compose.yml builds from source) and by
+# the pull template (which uses SHOPDB_IMAGE instead).
 IMAGE_TAG=0.7.0
+# Pull deploy only (docker-compose.pull.yml): the full image reference to pull.
+# SHOPDB_IMAGE=ghcr.io/<org>/shopdb-flask:stable
+#
+# Non-empty lights a channel badge in the sidebar. Leave unset on a real site;
+# the dev stacks set it to DEV.
+# SHOPDB_ENV_LABEL=
 
 # ---- Zabbix integration (optional, for printer supply monitoring) ----
 ZABBIX_URL=
@@ -89,36 +101,25 @@ ZABBIX_TOKEN=
 # (flask plugin stamp-bundled) and pinning keys above.
 # PLUGIN_REQUIRE_SIGNED=false
 #
-# Dev-only: directories whose UNSIGNED plugins are trusted, honored ONLY under
-# DEBUG/TESTING (external-repo/symlink dev). Production ignores this.
-# PLUGIN_DEV_TRUST_DIRS=/home/dev/my-plugin-repo
-#
 # Read-only folder the app pulls plugin artifacts from (a SharePoint-synced or
 # copied shelf). The app reads this folder; it never speaks any network.
 # PLUGIN_SHELF_DIR=/srv/shopdb/plugin-shelf
 
 # ---- Employee directory database (optional, read-only) ----
-# Separate HR/employee lookup DB consumed by the notifications plugin and the
-# public shopfloor kiosks. Leave unset if the feature is not used; there is no
-# safe default for the password, so an unset password fails loud.
+# Separate HR/employee lookup DB. Core reads it in two places: the employee
+# domain of global search (shopdb/core/api/search.py) and audit-log name
+# resolution (shopdb/core/api/auditlogs.py). Leave unset if the site has no
+# such database; there is no safe default for the password, so an unset
+# password fails loud rather than connecting as someone else.
 # EMPLOYEE_DB_HOST=
 # EMPLOYEE_DB_USER=
 # EMPLOYEE_DB_PASSWORD=
-# EMPLOYEE_DB_NAME=wjf_employees
-
-# ---- cmmc_usb database (USB check-in/out) ----
-# Separate read-write MySQL DB used by the USB plugin to track device
-# check-in/out, lockers, and the check-in/out log. Leave unset if the feature
-# is not used; there is no safe default for the password, so an unset password
-# fails loud.
-# CMMC_USB_DB_HOST=
-# CMMC_USB_DB_USER=
-# CMMC_USB_DB_PASSWORD=
-# CMMC_USB_DB_NAME=cmmc_usb
+# EMPLOYEE_DB_NAME=employees
 
 # ---- Subpath deployment (optional) ----
-# Serve the app under a URL prefix instead of the server root, e.g. as an IIS
-# Application at /ops under an existing site. The frontend must be rebuilt with
-# the matching base: VITE_BASE_PATH=/ops/ npm run build. Leave unset when the
-# app owns its own site/port (the default). See the INSTALL-WINDOWS-IIS wiki page.
+# Serve the app under a URL prefix instead of the server root, e.g. behind an
+# nginx location at /ops. wsgi.py reads this to mount the WSGI app under the
+# prefix. The frontend must be rebuilt with the matching base:
+# VITE_BASE_PATH=/ops/ npm run build. Leave unset when the app owns its own
+# host/port, which is the container default.
 # MOUNT_PATH=/ops