Multi-site distribution readiness: settings-driven site config, security closeout, release engineering, v0.5.0

Make the app distributable to other GE Aerospace sites (one self-hosted
instance per site, ADR-004). GE values remain the shipped defaults; every
site-specific behavior is now a Setting an admin can change in the UI.

Settings-driven site config:
- Branding: site/QR/badge logos, favicon, primary color (upload endpoints
  mirror the map-blueprint pattern; new Settings > Branding section).
- ServiceNow: search/incident/change URL templates ({ticket}), ticket
  prefixes, enable toggle. Defaults point at the current
  geaerospaceqa.service-now.com global search. Disabled = plain-text tickets.
- Employee-id regex (employeeid_pattern), printer hostname template,
  QR label targets (qr_target_printer / qr_target_usb, blank = asset page,
  else URL template with placeholders), usb_label_style (barcode|qr).
- West Jefferson floor-plan PNGs removed from the tree; generic placeholder
  ships as the map default and sites upload their own blueprint.

Security closeout:
- dashboarddefaults writes now require admin.
- Collector: generic error messages (no str(exc) leak); API key accepted
  via X-API-Key header only (BREAKING: querystring api_key removed).
- IP-based login rate limiting (AUTH_RATELIMIT_* knobs) atop account lockout.
- Setting.set() creation race fixed (IntegrityError retry).

Release engineering and docs:
- __version__ 0.5.0 (distinct from __contract_version__, ADR-007),
  CHANGELOG.md, Gitea Actions CI config, frontend version aligned.
- One wizard-first install story across README/DEPLOY; new CONFIG.md,
  UPGRADE.md, BACKUP-RESTORE.md; CLAUDE.md and ROADMAP de-staled.
- Dockerfile multi-stage build now bundles the frontend; compose binds
  MySQL to 127.0.0.1; stale database/schema.sql and one-off SQL removed.

Debt and fixes:
- .query.get() -> db.session.get() sweep; datetime.utcnow() removed
  (naive-UTC via timezone-aware now); users.py on authz decorators.
- Fixed 4 stale tests (slides feed shape, shopfloor splitperemployee,
  plugin contract purity) and the USB label page field mapping (both usb
  modes emit the cmmc shape: device_id/device_desc).
- Health endpoint reports the real version.

248 tests pass; naming/style check green; frontend builds; fresh-DB
flask db upgrade + seeds verified; QR targets verified by decoding
rendered codes.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

plugins/knowledgebase/api/routes.py

@@ -102,7 +102,7 @@ def get_stats():
 @jwt_required(optional=True)
 def get_article(link_id: int):
     """Get a single knowledge base article."""
-    article = KnowledgeBase.query.get(link_id)
+    article = db.session.get(KnowledgeBase, link_id)
 
     if not article or not article.isactive:
         return error_response(ErrorCodes.NOT_FOUND, 'Article not found', http_code=404)
@@ -123,7 +123,7 @@ def get_article(link_id: int):
 @jwt_required(optional=True)
 def track_click(link_id: int):
     """Increment click counter and return the URL to redirect to."""
-    article = KnowledgeBase.query.get(link_id)
+    article = db.session.get(KnowledgeBase, link_id)
 
     if not article or not article.isactive:
         return error_response(ErrorCodes.NOT_FOUND, 'Article not found', http_code=404)
@@ -152,7 +152,7 @@ def create_article():
 
     # Validate application if provided
     if data.get('appid'):
-        app = Application.query.get(data['appid'])
+        app = db.session.get(Application, data['appid'])
         if not app:
             return error_response(ErrorCodes.NOT_FOUND, 'Application not found', http_code=404)
 
@@ -175,7 +175,7 @@ def create_article():
 @require_permission('kb.edit')
 def update_article(link_id: int):
     """Update a knowledge base article."""
-    article = KnowledgeBase.query.get(link_id)
+    article = db.session.get(KnowledgeBase, link_id)
 
     if not article:
         return error_response(ErrorCodes.NOT_FOUND, 'Article not found', http_code=404)
@@ -186,7 +186,7 @@ def update_article(link_id: int):
 
     # Validate application if being changed
     if 'appid' in data and data['appid']:
-        app = Application.query.get(data['appid'])
+        app = db.session.get(Application, data['appid'])
         if not app:
             return error_response(ErrorCodes.NOT_FOUND, 'Application not found', http_code=404)
 
@@ -204,7 +204,7 @@ def update_article(link_id: int):
 @require_permission('kb.delete')
 def delete_article(link_id: int):
     """Delete (deactivate) a knowledge base article."""
-    article = KnowledgeBase.query.get(link_id)
+    article = db.session.get(KnowledgeBase, link_id)
 
     if not article:
         return error_response(ErrorCodes.NOT_FOUND, 'Article not found', http_code=404)