README: count the plugins the tree has, and point somewhere useful

It claimed thirteen bundled plugins and listed thirteen; there are fifteen, and
the two missing ones - backups and tools - were undiscoverable from the first
page anyone reads. The count is gone rather than corrected, because a number
typed here goes stale exactly the way it just did; the generated map carries it.

The version and count guard now covers README.md and CONTRIBUTING.md, not just
docs/. A rule that leaves the most-read file in the repository outside it is
most of a rule.

Also names the reference site as the reference site rather than by plant, adds a
pointer to START-HERE, and corrects the distribution paragraph: it told a reader
of the public mirror that the code is only available on an internal server,
which is both wrong and unhelpful now that the installer ships as a release
asset.

README.md

@@ -108,8 +108,10 @@ SQLite). Do not run dev or production against SQLite.
 
 ### Distribution
 
-The application is distributed through the internal GE Aerospace git server. Clone
-it from there; there is no public package or image registry.
+Source lives here. The Windows installer ships as a release asset rather than a
+file in the repository - it is around 240 MB, well past what a repository takes
+and well inside what a release asset does. There is no package or image
+registry; a site installs from that `.exe` or builds from source.
 
 ### Fast path (Docker)
 
@@ -172,7 +174,8 @@ project wiki.
 To import a site's legacy data, use the HTTP import surface: an admin API
 token plus [docs/IMPORT-API.md](docs/IMPORT-API.md) drive the whole migration
 through documented endpoints (`X-Import-Mode` preserves original timestamps).
-`scripts/site_imports/wjf/` is the West Jefferson reference loader.
+`scripts/site_imports/wjf/` is the reference site's loader, kept as a worked
+example of the whole sequence.
 
 ### Which deployment route
 
@@ -220,12 +223,22 @@ Query parameters for list endpoints:
 - `search` - Search term
 - `assettype` - Filter by asset type (computer, printer, machine, networkdevice, measuringtool)
 
+## Where to start
+
+[docs/START-HERE.md](docs/START-HERE.md) routes by what you are here to do -
+standing up a site, deploying the shop-floor tools, writing a plugin,
+integrating with the API, or diagnosing something. On the published mirror the
+same page is the wiki's front door.
+
 ## Plugin System
 
 ShopDB supports plugins for extending functionality. See `CONTRIBUTING.md` for plugin development guidelines.
 
-The image bundles thirteen plugins; only the ones a site installs are loaded:
+The image bundles these plugins; only the ones a site installs are loaded. The
+current count and each plugin's version and migration head are in
+[docs/PROJECT-MAP.md](docs/PROJECT-MAP.md), which is generated:
 
+- **backups** - Machine configuration backups (NTLARS/DNC, CMM, part marker, UDC) with revision history and diffs
 - **computers** - Shopfloor PCs and workstations, collector fleet ingest
 - **employees** - Employee directory
 - **geenforce** - GE-Enforce imaging/software manifests and fleet compliance
@@ -237,6 +250,7 @@ The image bundles thirteen plugins; only the ones a site installs are loaded:
 - **printedparts** - 3D-printed part catalogue, kiosk issue tracking and stock alerts
 - **printers** - Extended printer management with Zabbix integration
 - **slides** - TV/kiosk slideshows
+- **tools** - Tech Tools: barcode and QR generation laid out for real label stock
 - **usb** - CMMC USB check-in/out tracking
 - **warranty** - Warranty records with Dell lookups