feat: ExperionCrawler IIoT OPC UA Data Bridge Infrastructure

Major project initialization and feature implementation:

**Core Features:**
- OPC UA client for Honeywell Experion HS R530 integration
- Real-time data streaming and history data retrieval
- Text-to-SQL query engine with TimeScaleDB
- JSON-based node configuration system
- SQLite database with migration support

**Architecture:**
- Clean architecture with Domain, Application, Infrastructure layers
- ASP.NET Core Web API frontend
- Web UI with real-time visualization
- PKI-based OPC UA authentication (TLS)

**Infrastructure Components:**
- ExperionOpcClient: OPC UA connection management
- ExperionRealtimeService: Real-time data streaming
- ExperionHistoryService: Historical data queries
- TextToSqlService: Natural language to SQL queries
- SqlValidator: SQL injection prevention

**Database:**
- TimescaleDB integration (recommended) or SQLite fallback
- Entity Framework Core with Extenstion methods
- OPCTag, KeyValue tables for data storage

**Security:**
- Certificate-based OPC UA endpoint security
- SSL/TLS encryption for database connections
- Output param binding injection prevention

**Testing:**
- Unit tests for TextToSqlService and SqlValidator
- Integration tests for Korean time range extraction

See REVIEW_REQUEST.md for detailed code review information.

.claude/settings.json

@@ -0,0 +1,12 @@
+{
+  "mcpServers": {
+    "iiot-rag": {
+      "command": "/home/windpacer/projects/ExperionCrawler/mcp-server/.venv/bin/python",
+      "args": [
+        "/home/windpacer/projects/ExperionCrawler/mcp-server/server.py"
+      ],
+      "env": {},
+      "description": "ExperionCrawler RAG — Qdrant(코드베이스+OPC UA 문서) + GLM-4.7-Flash"
+    }
+  }
+}