api: serve interactive OpenAPI docs at /api/docs (offline) + llms.txt

Generate docs/openapi.json (3.1, 362 operations) from the API inventory via
scripts/gen_openapi.py, and serve it with a self-hosted Redoc bundle at
/api/docs - no CDN, works on the air-gapped box. Also serve docs/llms.txt (a
concise LLM entrypoint) at /api/docs/llms.txt. New core 'docs' blueprint;
staticdocs/ excluded from the naming check (vendored minified JS).

docs/llms.txt

@@ -0,0 +1,58 @@
+# ShopDB Flask API - LLM guide
+
+ShopDB is a plugin-based asset-management system (PCs, printers, machines,
+network devices, measuring tools, applications, knowledge base, USB, warranties)
+for GE Aerospace sites. This file is the quick entrypoint; the full machine
+spec is the OpenAPI at `/api/docs/openapi.json` (browse it at `/api/docs`).
+
+## Base URL
+Prod (West Jefferson): `https://tsgwp00525.wjs.geaerospace.net/shopdb`
+All API paths are under `/api` (e.g. `<base>/api/assets`). Dev: `http://localhost:5001`.
+
+## Auth
+Three schemes:
+- **Bearer JWT** - most endpoints. Get one by logging in, or use a managed
+  Personal Access Token (PAT). Send `Authorization: Bearer <token>`.
+  - Login: `POST /api/auth/login` `{ "username": "...", "password": "..." }`
+    -> `data.access_token`. Refresh: `POST /api/auth/refresh`.
+  - PATs are minted in the UI (Settings > API Tokens); a *scoped* PAT is limited
+    to named permissions and suspends the admin bypass.
+- **X-API-Key** - unattended/service endpoints (collector ingest, GE-Enforce
+  fetch). Send `X-API-Key: <managed-token>`.
+- **Public** - some read endpoints (e.g. printer install-list, employee search,
+  dashboards) need no auth.
+
+Auth level per endpoint is in the OpenAPI `security` field: `bearerAuth`,
+`apiKeyAuth`, or none. Admin-only and permission-gated routes both use bearer.
+
+## Response envelope
+JSON endpoints return `{ "status": "success", "data": <payload>, "meta": {...} }`.
+Errors: `{ "status": "error", "message": "...", "code": "..." }` with an HTTP 4xx/5xx.
+Lists include `meta.total` / pagination. A few feed endpoints (screensaver, some
+installer text formats) return raw text/JSON without the envelope - noted per route.
+
+## Common recipes
+- Search everything: `GET /api/search?q=<term>` (multi-word = AND across words).
+- List assets on the map: `GET /api/assets/map`.
+- List a type: `GET /api/printers`, `/api/computers`, `/api/machines`,
+  `/api/network`, `/api/measuringtools` (paginated: `?page=&perpage=`).
+- Get one: `GET /api/printers/<id>` etc.
+- Create (bearer): `POST /api/printers` `{assetnumber, windowsname, vendorid, ...}`.
+- Reports: `GET /api/reports` (list), `GET /api/reports/pc-relationships` (PC<->machine).
+- Printer installer data: `GET /api/printers/install-list` (public; add
+  `?format=text` for a pipe-delimited variant); `GET /api/printers/pc-default?machine=<n>`.
+- Collector ingest (X-API-Key): `POST /api/collector/computers`.
+- GE-Enforce: `GET /api/geenforce/manifest?pctype=<scope>`,
+  `GET /api/geenforce/payload/<sha256>`, `POST /api/geenforce/report`.
+- Import (admin PAT, preserves timestamps with `X-Import-Mode`): see docs/IMPORT-API.md.
+
+## Conventions
+- DB-mirrored params/fields use lowercase concatenated names (no underscores):
+  `locationid`, `vendorid`, `windowsname` - match them exactly.
+- IDs in paths are integers.
+- Plugin endpoints live under the plugin's prefix (`/api/<plugin>/...`).
+
+## Full reference
+- Machine spec: `GET /api/docs/openapi.json` (OpenAPI 3.1, 362 operations).
+- Interactive: `GET /api/docs` (Redoc).
+- Human reference: `docs/API-REFERENCE.md`.