Add Claude N8N toolkit with Docker mock API server

- Added comprehensive N8N development tools collection
- Added Docker-containerized mock API server for testing
- Added complete documentation and setup guides
- Added mock API server with health checks and data endpoints
- Tools include workflow analyzers, debuggers, and controllers

🤖 Generated with [Claude Code](https://claude.ai/code)

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

claude_n8n/tools/mock_api_server/api_data/matrix_messages.json

@@ -0,0 +1,98 @@
+[
+  {
+    "chunk": [
+      {
+        "type": "m.room.message",
+        "room_id": "!xZkScMybPseErYMJDz:matrix.klas.chat",
+        "sender": "@klas:matrix.klas.chat",
+        "content": {
+          "body": "The hybrid deduplication system is now working perfectly. We've successfully implemented content-based analysis that eliminates dependency on N8N workflow variables.",
+          "m.mentions": {},
+          "msgtype": "m.text"
+        },
+        "origin_server_ts": 1750017000000,
+        "unsigned": {
+          "membership": "join",
+          "age": 1000
+        },
+        "event_id": "$memory_1_recent_implementation_success",
+        "user_id": "@klas:matrix.klas.chat",
+        "age": 1000
+      },
+      {
+        "type": "m.room.message",
+        "room_id": "!xZkScMybPseErYMJDz:matrix.klas.chat",
+        "sender": "@developer:matrix.klas.chat",
+        "content": {
+          "body": "Key improvements include age-based filtering (30+ minutes), system message detection, and enhanced duplicate detection using content fingerprinting. The solution addresses the core issue where 10-message chunks were being reprocessed.",
+          "m.mentions": {},
+          "msgtype": "m.text"
+        },
+        "origin_server_ts": 1750017060000,
+        "unsigned": {
+          "membership": "join",
+          "age": 2000
+        },
+        "event_id": "$memory_2_technical_details",
+        "user_id": "@developer:matrix.klas.chat",
+        "age": 2000
+      },
+      {
+        "type": "m.room.message",
+        "room_id": "!xZkScMybPseErYMJDz:matrix.klas.chat",
+        "sender": "@ai_assistant:matrix.klas.chat",
+        "content": {
+          "body": "Memory retention has been significantly improved. The false duplicate detection that was causing 0.2-minute memory lifespans has been resolved through sophisticated content analysis and multiple validation layers.",
+          "m.mentions": {},
+          "msgtype": "m.text"
+        },
+        "origin_server_ts": 1750017120000,
+        "unsigned": {
+          "membership": "join",
+          "age": 3000
+        },
+        "event_id": "$memory_3_retention_improvement",
+        "user_id": "@ai_assistant:matrix.klas.chat",
+        "age": 3000
+      },
+      {
+        "type": "m.room.message",
+        "room_id": "!xZkScMybPseErYMJDz:matrix.klas.chat",
+        "sender": "@system_monitor:matrix.klas.chat",
+        "content": {
+          "body": "Test results: 2/2 scenarios passed. Valid recent messages are processed correctly, while old messages (1106+ minutes) are properly filtered. The enhanced deduplication is fully operational with robust duplicate detection.",
+          "m.mentions": {},
+          "msgtype": "m.text"
+        },
+        "origin_server_ts": 1750017180000,
+        "unsigned": {
+          "membership": "join",
+          "age": 4000
+        },
+        "event_id": "$memory_4_test_results",
+        "user_id": "@system_monitor:matrix.klas.chat",
+        "age": 4000
+      },
+      {
+        "type": "m.room.message",
+        "room_id": "!xZkScMybPseErYMJDz:matrix.klas.chat",
+        "sender": "@project_lead:matrix.klas.chat",
+        "content": {
+          "body": "Next phase: Monitor memory creation and consolidation patterns. The hybrid solution combines deterministic deduplication with AI-driven memory management for optimal performance and accuracy.",
+          "m.mentions": {},
+          "msgtype": "m.text"
+        },
+        "origin_server_ts": 1750017240000,
+        "unsigned": {
+          "membership": "join",
+          "age": 5000
+        },
+        "event_id": "$memory_5_next_phase",
+        "user_id": "@project_lead:matrix.klas.chat",
+        "age": 5000
+      }
+    ],
+    "start": "t500-17000_0_0_0_0_0_0_0_0_0",
+    "end": "t505-17005_0_0_0_0_0_0_0_0_0"
+  }
+]

claude_n8n/tools/mock_api_server/api_data/test_data.json

@@ -0,0 +1,18 @@
+{
+  "message": "Hello from mock API",
+  "timestamp": 1749928362092,
+  "items": [
+    {
+      "id": 1,
+      "name": "Item 1"
+    },
+    {
+      "id": 2,
+      "name": "Item 2"
+    },
+    {
+      "id": 3,
+      "name": "Item 3"
+    }
+  ]
+}