feat: blockchain production updates for aitbc1

- Update blockchain node scripts for devnet and mainnet
- Update blockchain RPC router for production
- Update coordinator API main configuration
- Update blockchain router endpoints
- Add production key generation script
- Remove gitea token file (security)

apps/blockchain-node/src/aitbc_chain/app.py

@@ -16,7 +16,7 @@ from .mempool import init_mempool
 from .metrics import metrics_registry
 from .rpc.router import router as rpc_router
 from .rpc.websocket import router as websocket_router
-from .escrow_routes import router as escrow_router
+# from .escrow_routes import router as escrow_router  # Not yet implemented
 
 _app_logger = get_logger("aitbc_chain.app")
 
@@ -132,7 +132,7 @@ def create_app() -> FastAPI:
     # Include routers
     app.include_router(rpc_router, prefix="/rpc", tags=["rpc"])
     app.include_router(websocket_router, prefix="/rpc")
-    app.include_router(escrow_router, prefix="/rpc")
+    # app.include_router(escrow_router, prefix="/rpc")  # Disabled until escrow routes are implemented
 
     # Metrics and health endpoints
     metrics_router = APIRouter()

apps/blockchain-node/src/aitbc_chain/rpc/router.py

@@ -4,6 +4,7 @@ from sqlalchemy import func
 import asyncio
 import json
 import time
+from pathlib import Path
 from typing import Any, Dict, Optional
 
 from fastapi import APIRouter, HTTPException, status