feat(modernization): promote deferred routes to in-scope and unify page header styles

Promote /tables, /excel-query, /query-tool, /mid-section-defect from
deferred to full shell-governed in-scope routes with canonical redirects,
content contracts, governance artifacts, and updated CI gates.

Unify all page header gradients to #667eea → #764ba2 and h1 font-size
to 24px for visual consistency across all dashboard pages. Remove
Native Route-View dev annotations from job-query, excel-query, and
query-tool headers.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

.env.example

@@ -72,6 +72,16 @@ GUNICORN_WORKERS=2
 # Threads per worker
 GUNICORN_THREADS=4
 
+# Worker timeout (seconds): should stay above DB/query-tool slow paths
+GUNICORN_TIMEOUT=130
+
+# Graceful shutdown timeout for worker reloads (seconds)
+GUNICORN_GRACEFUL_TIMEOUT=60
+
+# Worker recycle policy (set 0 to disable)
+GUNICORN_MAX_REQUESTS=5000
+GUNICORN_MAX_REQUESTS_JITTER=500
+
 # ============================================================
 # Redis Configuration (for WIP cache)
 # ============================================================