remove jellyfin, mqtt, webhook services, fix tests, add schema migrations

- delete server/services/jellyfin.ts, webhook.ts, mqtt.ts and their tests
- strip jellyfin/mqtt imports and startup calls from index.tsx and settings.ts
- remove /jellyfin, /mqtt, /mqtt/status, /mqtt/test, /jellyfin/webhook-plugin endpoints from settings router
- clean ENV_MAP and isEnvConfigured of jellyfin/mqtt keys
- add db/index.ts migrations for series_key, duration_seconds, scan_status, scan_error, last_scanned_at (new columns absent on older dev DBs)
- move idx_media_items_series_key out of SCHEMA into migrate() so it runs after the column is added
- fix all test fixtures: drop jellyfin_id/series_jellyfin_id column refs, update MediaItem/MediaStream object literals to match current types

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

server/api/__tests__/review-groups.test.ts

@@ -17,7 +17,7 @@ interface SeedOpts {
 	type: "Movie" | "Episode";
 	name?: string;
 	seriesName?: string | null;
-	seriesJellyfinId?: string | null;
+	seriesKey?: string | null;
 	seasonNumber?: number | null;
 	episodeNumber?: number | null;
 	autoClass?: "auto" | "auto_heuristic" | "manual" | null;
@@ -30,7 +30,7 @@ function seed(db: Database, opts: SeedOpts) {
 		type,
 		name = `Item ${id}`,
 		seriesName = null,
-		seriesJellyfinId = null,
+		seriesKey = null,
 		seasonNumber = null,
 		episodeNumber = null,
 		autoClass = "manual",
@@ -38,9 +38,9 @@ function seed(db: Database, opts: SeedOpts) {
 	} = opts;
 	db
 		.prepare(
-			"INSERT INTO media_items (id, jellyfin_id, type, name, series_name, series_jellyfin_id, season_number, episode_number, file_path) VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?)",
+			"INSERT INTO media_items (id, type, name, series_name, series_key, season_number, episode_number, file_path) VALUES (?, ?, ?, ?, ?, ?, ?, ?)",
 		)
-		.run(id, `jf-${id}`, type, name, seriesName, seriesJellyfinId, seasonNumber, episodeNumber, `/x/${id}.mkv`);
+		.run(id, type, name, seriesName, seriesKey, seasonNumber, episodeNumber, `/x/${id}.mkv`);
 	db
 		.prepare(
 			"INSERT INTO review_plans (item_id, status, is_noop, auto_class, sorted, apple_compat, job_type, notes) VALUES (?, 'pending', 0, ?, ?, 'direct_play', 'copy', NULL)",
@@ -56,7 +56,7 @@ describe("buildReviewGroups", () => {
 				id: i,
 				type: "Episode",
 				seriesName: "Breaking Bad",
-				seriesJellyfinId: "bb",
+				seriesKey: "bb",
 				seasonNumber: 1,
 				episodeNumber: i,
 			});
@@ -81,7 +81,7 @@ describe("buildReviewGroups", () => {
 				id: ep,
 				type: "Episode",
 				seriesName: "Lost",
-				seriesJellyfinId: "lost",
+				seriesKey: "lost",
 				seasonNumber: 1,
 				episodeNumber: ep,
 			});
@@ -91,12 +91,12 @@ describe("buildReviewGroups", () => {
 				id: 10 + ep,
 				type: "Episode",
 				seriesName: "Lost",
-				seriesJellyfinId: "lost",
+				seriesKey: "lost",
 				seasonNumber: 2,
 				episodeNumber: ep,
 			});
 		}
-		seed(db, { id: 99, type: "Episode", seriesName: "Lost", seriesJellyfinId: "lost", seasonNumber: null });
+		seed(db, { id: 99, type: "Episode", seriesName: "Lost", seriesKey: "lost", seasonNumber: null });
 
 		const { groups } = buildReviewGroups(db, { bucket: "review" });
 		expect(groups).toHaveLength(1);
@@ -125,7 +125,7 @@ describe("buildReviewGroups", () => {
 			id: 1,
 			type: "Episode",
 			seriesName: "Show",
-			seriesJellyfinId: "s",
+			seriesKey: "s",
 			seasonNumber: 1,
 			episodeNumber: 1,
 			autoClass: "auto_heuristic",
@@ -134,7 +134,7 @@ describe("buildReviewGroups", () => {
 			id: 2,
 			type: "Episode",
 			seriesName: "Show",
-			seriesJellyfinId: "s",
+			seriesKey: "s",
 			seasonNumber: 1,
 			episodeNumber: 2,
 			autoClass: "manual",