feat: refactor platforms to support multiple TMDB provider IDs per platform

- Replace `tmdbProviderId` (single int) with a many-to-many `platformTmdbProviders` join table so one platform entry can map to multiple TMDB provider IDs (e.g. a single "Max" platform covers several regional TMDB IDs)
- Add `isSubscription` flag to platforms to distinguish subscription services from transactional ones, replacing the old `displayOrder` field in API responses
- Add `getPlatformTmdbIds` / `getPlatformTmdbIdMap` helpers in `@sofa/core/platforms` and thread them through discover, explore, and platform list procedures
- Replace `providerId: number` with `platformId: string` (UUID) in discover input schema so the client never needs to resolve TMDB IDs
- Add `scripts/sync-tmdb-providers.ts` script to pull live provider data from TMDB and update `platforms.json`
- Split native title detail availability into separate "Stream" and "Buy or Rent" sections matching the web pattern
- Add two new DB migrations for the join table and platform schema changes

packages/test/src/db.ts

@@ -16,6 +16,7 @@ const {
   userEpisodeWatches,
   userTitleStatus,
   userRatings,
+  platformTmdbIds,
   platforms,
   titleAvailability,
   userPlatforms,
@@ -178,9 +179,9 @@ export function insertPlatform(
     id?: string;
     name?: string;
     tmdbProviderId?: number;
+    tmdbProviderIds?: number[];
     logoPath?: string;
     urlTemplate?: string;
-    displayOrder?: number;
   } = {},
 ) {
   const id = overrides.id ?? "platform-1";
@@ -189,12 +190,15 @@ export function insertPlatform(
     .values({
       id,
       name: overrides.name ?? "Netflix",
-      tmdbProviderId: overrides.tmdbProviderId ?? 8,
       logoPath: overrides.logoPath ?? "/logo.png",
       urlTemplate: overrides.urlTemplate ?? "https://www.netflix.com/search?q={title}",
-      displayOrder: overrides.displayOrder ?? 1,
     })
     .run();
+
+  const tmdbIds = overrides.tmdbProviderIds ?? [overrides.tmdbProviderId ?? 8];
+  for (const tmdbId of tmdbIds) {
+    testDb.insert(platformTmdbIds).values({ platformId: id, tmdbProviderId: tmdbId }).run();
+  }
   return id;
 }