docs: record postgres health store modes

08 - Operations/Monitoring.md

@@ -14,14 +14,14 @@ What's instrumented today and what to watch. Today's stack is intentionally lean
 Two paths are registered (both are public, rate-limited, not auth-gated):
 
 - `GET /health` — simple ping used by Docker healthchecks. Returns `200 { success, message, timestamp, environment, version }`. Does **not** probe MongoDB or Redis.
-- `GET /api/health` — deep health check added in commit `44579d6` (backend v2.6.49). Calls `runHealthChecks` from `backend/src/services/health/healthCheckService.ts`. Probes MongoDB, Postgres, Redis, Request Network registry data, and Request Network API reachability. Returns `503` only when `report.status === 'down'`. As of backend `2.8.9`, Postgres is a hard dependency only when at least one `*_STORE=postgres` flag is enabled; otherwise an unconfigured Postgres check is reported as skipped.
+- `GET /api/health` — deep health check added in commit `44579d6` (backend v2.6.49). Calls `runHealthChecks` from `backend/src/services/health/healthCheckService.ts`. Probes MongoDB, Postgres, Redis, Request Network registry data, and Request Network API reachability. Returns `503` only when `report.status === 'down'`. As of backend `2.8.11`, Postgres is a hard dependency only when at least one `*_STORE=postgres` flag is enabled; otherwise an unconfigured Postgres check is reported as skipped. The Postgres check also reports active store modes so monitoring can distinguish "PG is reachable" from "this runtime is actually using PG-backed stores".
 
 `GET /api/health` response shape (from `healthCheckService`):
 ```json
 {
   "status": "ok",
-  "version": "2.6.xx",
-  "timestamp": "...",
+  "version": "2.8.11",
+  "uptimeSec": 662,
   "checks": {
     "db": { "ok": true, "latencyMs": 4 },
     "postgres": {
@@ -29,6 +29,25 @@ Two paths are registered (both are public, rate-limited, not auth-gated):
       "latencyMs": 5,
       "configured": true,
       "required": true,
+      "storeModes": {
+        "auth": "postgres",
+        "config": "postgres",
+        "address": "postgres",
+        "category": "postgres",
+        "levelConfig": "postgres",
+        "shopSettings": "postgres",
+        "review": "postgres"
+      },
+      "enabledStores": [
+        "auth",
+        "config",
+        "address",
+        "category",
+        "levelConfig",
+        "shopSettings",
+        "review"
+      ],
+      "enabledStoreCount": 7,
       "database": "amanat_dev",
       "user": "amanat"
     },