fix: include wait-for-db.sh in Docker build context

The .dockerignore added in 8a0d82f incorrectly excluded wait-for-db.sh,
but the Dockerfile copies it as the container entrypoint. This caused
the Docker build to fail with 'failed to compute cache key: not found'.

Quality gates: verified file exists, py_compile passed.

apps/api/src/api/config_profiles.py

@@ -845,6 +845,7 @@ async def resolve_default_profile(
 # Default profile management
 # ---------------------------------------------------------------------------
 
+
 class DefaultProfilesUpdate(BaseModel):
     default_profiles: dict[str, str] = Field(
         description="Mapping of tool_type_id -> profile_id for default profiles"
@@ -935,9 +936,7 @@ async def get_default_profile_for_tool_type_endpoint(
         select(UserConfig).where(UserConfig.user_id == user_id)
     )
     user_config = result.scalar_one_or_none()
-    profile_id = (
-        user_config.default_profiles.get(tool_type_id) if user_config else None
-    )
+    profile_id = user_config.default_profiles.get(tool_type_id) if user_config else None
     return {"tool_type_id": tool_type_id, "profile_id": profile_id}