feat(db): add lidarr_config + lidarr_requests schema (migration 0010)

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

internal/db/migrations/0010_lidarr.down.sql

@@ -0,0 +1,8 @@
+DROP INDEX IF EXISTS lidarr_requests_album_mbid_idx;
+DROP INDEX IF EXISTS lidarr_requests_artist_mbid_idx;
+DROP INDEX IF EXISTS lidarr_requests_status_idx;
+DROP INDEX IF EXISTS lidarr_requests_user_id_idx;
+DROP TABLE IF EXISTS lidarr_requests;
+DROP TYPE  IF EXISTS lidarr_request_kind;
+DROP TYPE  IF EXISTS lidarr_request_status;
+DROP TABLE IF EXISTS lidarr_config;

internal/db/migrations/0010_lidarr.up.sql

@@ -0,0 +1,63 @@
+-- M5a: Lidarr integration foundation. Two tables:
+--
+-- lidarr_config — singleton (CHECK id=1) holding the operator's Lidarr
+-- connection. enabled=false is the unconfigured state.
+--
+-- lidarr_requests — per-request lifecycle row created by users at
+-- /discover, transitioned by admin at /admin/requests, and matched
+-- back to library tracks by the reconciler worker. Three matched_*_id
+-- FKs (one per kind) instead of polymorphic — clean SQL, ON DELETE
+-- SET NULL preserves audit even if the matched track is later removed.
+
+CREATE TABLE lidarr_config (
+    id                          smallint PRIMARY KEY DEFAULT 1 CHECK (id = 1),
+    enabled                     boolean  NOT NULL DEFAULT false,
+    base_url                    text,
+    api_key                     text,
+    default_quality_profile_id  int,
+    default_root_folder_path    text,
+    created_at                  timestamptz NOT NULL DEFAULT now(),
+    updated_at                  timestamptz NOT NULL DEFAULT now()
+);
+
+INSERT INTO lidarr_config (id, enabled) VALUES (1, false);
+
+CREATE TYPE lidarr_request_status AS ENUM (
+    'pending', 'approved', 'rejected', 'completed', 'failed'
+);
+CREATE TYPE lidarr_request_kind AS ENUM ('artist', 'album', 'track');
+
+CREATE TABLE lidarr_requests (
+    id                         uuid PRIMARY KEY DEFAULT gen_random_uuid(),
+    user_id                    uuid NOT NULL REFERENCES users(id) ON DELETE CASCADE,
+    status                     lidarr_request_status NOT NULL DEFAULT 'pending',
+    kind                       lidarr_request_kind   NOT NULL,
+
+    lidarr_artist_mbid         text NOT NULL,
+    lidarr_album_mbid          text,
+    lidarr_track_mbid          text,
+    artist_name                text NOT NULL,
+    album_title                text,
+    track_title                text,
+
+    quality_profile_id         int,
+    root_folder_path           text,
+
+    decided_at                 timestamptz,
+    decided_by                 uuid REFERENCES users(id) ON DELETE SET NULL,
+    notes                      text,
+
+    completed_at               timestamptz,
+    matched_track_id           uuid REFERENCES tracks(id) ON DELETE SET NULL,
+    matched_album_id           uuid REFERENCES albums(id) ON DELETE SET NULL,
+    matched_artist_id          uuid REFERENCES artists(id) ON DELETE SET NULL,
+
+    requested_at               timestamptz NOT NULL DEFAULT now(),
+    updated_at                 timestamptz NOT NULL DEFAULT now()
+);
+
+CREATE INDEX lidarr_requests_user_id_idx     ON lidarr_requests (user_id);
+CREATE INDEX lidarr_requests_status_idx      ON lidarr_requests (status);
+CREATE INDEX lidarr_requests_artist_mbid_idx ON lidarr_requests (lidarr_artist_mbid);
+CREATE INDEX lidarr_requests_album_mbid_idx  ON lidarr_requests (lidarr_album_mbid)
+  WHERE lidarr_album_mbid IS NOT NULL;