Add GET /people browse/discover endpoint

Extends the browse/discover pattern already built for movies/series
to the fourth major entity type. No genre/year/status equivalent for
people -- known_for_department is the one categorical filter that
actually means something for a cast/crew list, and sort_by is just
popularity (default) or name. No invalid-filter case either: unlike
genre/status, known_for_department is a plain string compared
directly, nothing to parse or validate.

build_person_summary refactored to share row-to-summary logic with
the new list path, same pattern used for movies/series/companies.

Co-Authored-By: Claude Sonnet 5 <[email protected]>

app/api/v1/people.py

@@ -2,7 +2,9 @@
 
 from __future__ import annotations
 
-from fastapi import APIRouter, Depends
+from typing import Literal
+
+from fastapi import APIRouter, Depends, Query
 from redis.asyncio import Redis
 from sqlalchemy.ext.asyncio import AsyncSession
 
@@ -10,13 +12,34 @@ from app.api.deps import cached_response, not_found
 from app.core.database import get_db
 from app.core.redis import get_redis
 from app.core.security import enforce_rate_limit
-from app.schemas.person import PersonCreditsOut, PersonDetailOut
+from app.schemas.person import PersonCreditsOut, PersonDetailOut, PersonListOut
 from app.services import person_service
 from app.services.cache import build_key
 
 router = APIRouter(prefix="/people", tags=["people"], dependencies=[Depends(enforce_rate_limit)])
 
 
+@router.get("", response_model=PersonListOut)
+async def list_people(
+    known_for_department: str | None = Query(
+        None, description="Exact match, e.g. Acting, Directing, Writing"
+    ),
+    sort_by: Literal["popularity", "name"] = Query("popularity"),
+    sort_dir: Literal["asc", "desc"] = Query("desc"),
+    page: int = Query(1, ge=1),
+    page_size: int = Query(20, ge=1, le=50),
+    session: AsyncSession = Depends(get_db),
+) -> PersonListOut:
+    return await person_service.list_people(
+        session,
+        known_for_department=known_for_department,
+        sort_by=sort_by,
+        sort_dir=sort_dir,
+        page=page,
+        page_size=page_size,
+    )
+
+
 @router.get("/{aurora_id}", response_model=PersonDetailOut)
 async def get_person(
     aurora_id: str,