feat(phase-4b): backend business-logic, 8 entities, 32 endpoints, 58 tests

app/main.py

@@ -23,7 +23,18 @@ from sqlalchemy.exc import SQLAlchemyError
 from starlette.exceptions import HTTPException as StarletteHTTPException
 
 from app import __version__
-from app.api.v1 import auth, health, users
+from app.api.v1 import (
+    accounts,
+    activities,
+    auth,
+    contacts,
+    dashboard,
+    deals,
+    health,
+    notes,
+    tags,
+    users,
+)
 from app.core.config import get_settings
 from app.core.db import AsyncSessionLocal, dispose_engine
 
@@ -148,9 +159,10 @@ def create_app() -> FastAPI:
         request: Request, exc: RequestValidationError
     ) -> JSONResponse:
         """Format Pydantic validation errors consistently."""
+        from fastapi.encoders import jsonable_encoder
         return JSONResponse(
             status_code=status.HTTP_422_UNPROCESSABLE_ENTITY,
-            content={"detail": exc.errors()},
+            content={"detail": jsonable_encoder(exc.errors())},
         )
 
     @app.exception_handler(SQLAlchemyError)
@@ -169,6 +181,14 @@ def create_app() -> FastAPI:
     app.include_router(health.router)
     app.include_router(auth.router, prefix="/api/v1")
     app.include_router(users.router, prefix="/api/v1")
+    # Phase 4b business routers
+    app.include_router(accounts.router, prefix="/api/v1")
+    app.include_router(contacts.router, prefix="/api/v1")
+    app.include_router(deals.router, prefix="/api/v1")
+    app.include_router(activities.router, prefix="/api/v1")
+    app.include_router(notes.router, prefix="/api/v1")
+    app.include_router(tags.router, prefix="/api/v1")
+    app.include_router(dashboard.router, prefix="/api/v1")
 
     return app