feat: add hub runtime and extension contract

pyproject.toml

@@ -7,10 +7,27 @@ dependencies = [
     "fastapi>=0.115.0",
     "fastmcp>=2.0.0",
     "httpx>=0.28.0",
+    "jsonschema>=4.23.0",
     "sqlalchemy[asyncio]>=2.0.0",
     "pydantic>=2.10.0",
 ]
 
+[project.optional-dependencies]
+runtime = [
+    "alembic>=1.13.0",
+    "asyncpg>=0.29.0",
+    "psycopg2-binary>=2.9.0",
+    "uvicorn[standard]>=0.30.0",
+]
+
+[project.scripts]
+hub-core = "hub_core.runtime.cli:main"
+
+[dependency-groups]
+dev = [
+    "pytest>=8.0.0",
+]
+
 [build-system]
 requires = ["hatchling"]
 build-backend = "hatchling.build"