docs: rewrite CLAUDE.md from audit — drop stale 2025 fix journal

The old file was ~half September-2025 changelog with claims now wrong:
portal race condition (fixed via ON CONFLICT upsert), hypertable warning
(telemetry_events IS a hypertable on live), pool 5-20 (actually 5-100),
--no-cache rebuild for code changes (bind mounts + restart suffice),
/ws/live unauthenticated (cookie-authenticated since), static-HTML
frontend description (React since). Rewritten around current reality:
component map, WS endpoints + auth caveats, two-database schema-as-code
situation (alembic empty, manual ALTERs), route conventions, React
deploy flow, operational notes. Overlord Assistant Mode section
preserved verbatim (consumed at runtime by the agent service).

AGENTS.md: remove nonexistent GET /history, fix /ws/live auth claim.
Also delete stray mangled-path file from repo root.

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

AGENTS.md

@@ -68,9 +68,9 @@ Read shared integration rules first: `../AGENTS.md`.
 
 - Main health endpoint: `GET /debug`
 - Live data endpoint: `GET /live`
-- History endpoint: `GET /history`
-- Plugin WS endpoint: `/ws/position` (authenticated)
-- Browser WS endpoint: `/ws/live` (unauthenticated)
+- Trails endpoint: `GET /trails`
+- Plugin WS endpoint: `/ws/position` (authenticated via X-Plugin-Secret)
+- Browser WS endpoint: `/ws/live` (session-cookie authenticated; internal Docker-network clients trusted by IP)
 - Inventory service endpoint family: `/search/*`, `/inventory/*`, `/suitbuilder/*`
 
 ## Repo-specific architecture notes