chore: add missing migrations and routes

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

infra/migrations/0052_add_anilist_integration.sql

@@ -0,0 +1,16 @@
+-- Add AniList sync support
+ALTER TABLE libraries ADD COLUMN anilist_enabled BOOLEAN NOT NULL DEFAULT FALSE;
+
+CREATE TABLE anilist_series_links (
+    library_id    UUID    NOT NULL REFERENCES libraries(id) ON DELETE CASCADE,
+    series_name   TEXT    NOT NULL,
+    anilist_id    INTEGER NOT NULL,
+    anilist_title TEXT,
+    anilist_url   TEXT,
+    status        TEXT    NOT NULL DEFAULT 'linked', -- 'linked' | 'synced' | 'error'
+    linked_at     TIMESTAMPTZ NOT NULL DEFAULT NOW(),
+    synced_at     TIMESTAMPTZ,
+    PRIMARY KEY (library_id, series_name)
+);
+
+CREATE INDEX idx_anilist_series_links_library ON anilist_series_links(library_id);