refactor: consolidate logging to shared aitbc-core package and upgrade database dependencies

- Upgrade SQLAlchemy to 2.0.47 with asyncio extras in blockchain-node and coordinator-api
- Add asyncpg >=0.29.0 for PostgreSQL async support
- Remove uvloop as optional dependency, make it required >=0.22.0
- Delete duplicate logger.py from blockchain-node (117 lines)
- Refactor coordinator-api logging to use shared aitbc.logging from aitbc-core package
- Add aitbc-core package dependency to coordinator

apps/wallet-daemon/src/app/settings.py

@@ -2,7 +2,7 @@ from __future__ import annotations
 
 from pathlib import Path
 
-from pydantic import Field
+from pydantic import Field, field_validator
 from pydantic_settings import BaseSettings
 
 
@@ -13,11 +13,18 @@ class Settings(BaseSettings):
     debug: bool = Field(default=False)
 
     coordinator_base_url: str = Field(default="http://localhost:8011", alias="COORDINATOR_BASE_URL")
-    coordinator_api_key: str = Field(default="${CLIENT_API_KEY}", alias="COORDINATOR_API_KEY")
+    coordinator_api_key: str = Field(..., alias="COORDINATOR_API_KEY")
 
     rest_prefix: str = Field(default="/v1", alias="REST_PREFIX")
     ledger_db_path: Path = Field(default=Path("./data/wallet_ledger.db"), alias="LEDGER_DB_PATH")
 
+    @field_validator('coordinator_api_key')
+    @classmethod
+    def validate_api_key(cls, v: str) -> str:
+        if v.startswith('$') or not v or v == 'your_api_key_here':
+            raise ValueError('COORDINATOR_API_KEY must be set to a valid value and cannot be a template placeholder')
+        return v
+
     class Config:
         env_file = ".env"
         case_sensitive = False