Slice 3: the PR flow

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

backend/app/api.py

@@ -17,7 +17,7 @@ from typing import Any
 from fastapi import APIRouter, HTTPException, Request
 from pydantic import BaseModel, Field
 
-from . import api_branches, auth, db, entry as entry_mod, cache
+from . import api_branches, api_prs, auth, db, entry as entry_mod, cache
 from .bot import Bot
 from .config import Config
 from .gitea import Gitea, GiteaError
@@ -51,6 +51,8 @@ def make_router(
     # Slice 2: the §8 active-RFC view's endpoints live in api_branches.
     # Mounting them on the same router keeps the §17 layout flat.
     router.include_router(api_branches.make_router(config, gitea, bot, providers))
+    # Slice 3: the §10 PR-flow endpoints.
+    router.include_router(api_prs.make_router(config, gitea, bot, providers))
 
     # ---------------------------------------------------------------
     # Auth surface — extends the prototype's pattern but reads role