fix(analytics): remove duplicate sessionId index in PageViewSchema

- PageViewSchema had 'index: true' on sessionId field (line 16)
- AND compound index PageViewSchema.index({ sessionId: 1, timestamp: -1 })
- Compound index already covers sessionId queries (leftmost prefix)
- Removed redundant single-field index to eliminate Mongoose warning

.claude/session-state.json

@@ -43,7 +43,7 @@
       "last_deliberation": null
     },
     "FileEditHook": {
-      "timestamp": "2025-10-23T21:21:14.842Z",
+      "timestamp": "2025-10-23T21:22:32.195Z",
       "file": "/home/theflow/projects/tractatus/src/models/Analytics.model.js",
       "result": "passed"
     },
@@ -58,25 +58,25 @@
     "tokens": 30000
   },
   "alerts": [],
-  "last_updated": "2025-10-23T21:21:14.842Z",
+  "last_updated": "2025-10-23T21:22:32.196Z",
   "initialized": true,
   "framework_components": {
     "CrossReferenceValidator": {
       "message": 0,
       "tokens": 0,
-      "timestamp": "2025-10-23T21:21:26.151Z",
-      "last_validation": "2025-10-23T21:21:26.150Z",
-      "validations_performed": 679
+      "timestamp": "2025-10-23T21:22:38.898Z",
+      "last_validation": "2025-10-23T21:22:38.898Z",
+      "validations_performed": 683
     },
     "BashCommandValidator": {
       "message": 0,
       "tokens": 0,
       "timestamp": null,
-      "last_validation": "2025-10-23T21:21:26.152Z",
-      "validations_performed": 337,
+      "last_validation": "2025-10-23T21:22:38.899Z",
+      "validations_performed": 340,
       "blocks_issued": 37
     }
   },
-  "action_count": 337,
+  "action_count": 340,
   "auto_compact_events": []
 }

src/models/Analytics.model.js

@@ -13,7 +13,7 @@ const PageViewSchema = new mongoose.Schema({
 
   // Visitor Information (privacy-respecting)
   visitorId: { type: String, required: true, index: true }, // Hashed IP + User Agent
-  sessionId: { type: String, required: true, index: true }, // Session identifier
+  sessionId: { type: String, required: true }, // Session identifier (indexed via compound index below)
 
   // Request Details
   userAgent: { type: String },