Add movies/series filmography to company detail

GET /companies/{id} showed only the company's own info. Adds movies
and series lists (any role: production, distribution, network),
ordered by release/first-air date, read straight off the existing
movie_companies/series_companies junction rows -- no separate sync
needed since those only ever exist as a side effect of ingesting the
movie or series itself.

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

app/schemas/company.py

@@ -6,6 +6,9 @@ from datetime import datetime
 
 from pydantic import BaseModel
 
+from app.schemas.movie import MovieSummaryOut
+from app.schemas.tv import SeriesSummaryOut
+
 
 class CompanyDetailOut(BaseModel):
     id: str
@@ -20,5 +23,8 @@ class CompanyDetailOut(BaseModel):
     parent_company_id: str | None = None
     external_ids: dict[str, str] = {}
 
+    movies: list[MovieSummaryOut] = []
+    series: list[SeriesSummaryOut] = []
+
     created_at: datetime
     updated_at: datetime