docs: add Grafana dashboards appendix + link PLATFORM_OVERVIEW from CLAUDE.md

Adds section 6 (Grafana dashboards) to PLATFORM_OVERVIEW.html, generated from
the provisioned dashboard JSON: every panel in the NOC Fleet (9 panels) and
Daily Operations (23 panels) dashboards with type and source view/table.
Renumbers Operational notes to section 7. Links the doc from the CLAUDE.md
codebase map.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

CLAUDE.md

@@ -83,6 +83,8 @@ docker-compose.yaml         # Services: timescale_db, ingest_movement, ingest_ev
 grafana/                    # Grafana provisioning (baked into image)
 n8n-workflows/              # n8n workflow exports (incl. dwh_extract, dwh_load_bronze)
 docs/                       # Reference docs (connections, API, KPIs, project context)
+docs/PLATFORM_OVERVIEW.html # Current-state platform reference (architecture, deploy, read-API,
+                            #   full DB schema, Grafana panels) — open in a browser. Post n8n→fleetapi.
 docs/DWH_PIPELINE.md        # DWH pipeline operations runbook (setup, troubleshooting)
 docs/superpowers/          # Pitch specs and implementation plans (not deployed code)
 dwh/                        # DWH migrations for tracksolid_dwh@31.97.44.246:5888