feat: initialize netx ops tool repository

Set up netx as a standalone git-managed project with isolated Python dependencies, alarm ingestion/query APIs, oclaw bridge integration, and ops-focused UI enhancements including history and raw field access.

Co-authored-by: Cursor <cursoragent@cursor.com>

netx_api/db.py

@@ -0,0 +1,14 @@
+from __future__ import annotations
+
+from sqlalchemy import create_engine
+from sqlalchemy.orm import DeclarativeBase, sessionmaker
+
+from .config import settings
+
+
+class Base(DeclarativeBase):
+    pass
+
+
+engine = create_engine(settings.database_url, future=True, pool_pre_ping=True)
+SessionLocal = sessionmaker(bind=engine, autoflush=False, autocommit=False, expire_on_commit=False)