Add actor/cast information with person pages and search support

Integrate TMDB credits data into the app: cast carousels on title detail
pages, person detail pages with biography and filmography, and person
search results in the command palette. Includes new persons/titleCast
DB tables, profile image caching, and a nightly credits refresh cron job.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

hooks/use-search.ts

@@ -4,11 +4,14 @@ import { fetcher } from "@/lib/swr/fetcher";
 interface SearchResponse {
   results: {
     tmdbId: number;
-    type: "movie" | "tv";
+    type: "movie" | "tv" | "person";
     title: string;
     posterPath: string | null;
+    profilePath?: string | null;
     releaseDate: string | null;
     voteAverage: number;
+    knownFor?: string[];
+    knownForDepartment?: string;
   }[];
 }