Add backend foundation and config-driven workbench

backend/migrations/0005_config_pipeline.sql

@@ -0,0 +1,61 @@
+BEGIN;
+
+CREATE TABLE event_config_sources (
+  id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
+  event_id UUID NOT NULL REFERENCES events(id) ON DELETE CASCADE,
+  source_version_no INTEGER NOT NULL,
+  source_kind TEXT NOT NULL DEFAULT 'event_bundle' CHECK (source_kind IN ('event_bundle', 'manifest_only', 'preset')),
+  schema_id TEXT NOT NULL DEFAULT 'event-source',
+  schema_version TEXT NOT NULL DEFAULT '1',
+  status TEXT NOT NULL DEFAULT 'draft' CHECK (status IN ('draft', 'active', 'archived')),
+  source_jsonb JSONB NOT NULL DEFAULT '{}'::jsonb,
+  notes TEXT,
+  created_by_user_id UUID REFERENCES users(id) ON DELETE SET NULL,
+  created_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),
+  UNIQUE (event_id, source_version_no)
+);
+
+CREATE INDEX event_config_sources_event_id_idx ON event_config_sources(event_id);
+CREATE INDEX event_config_sources_status_idx ON event_config_sources(status);
+
+CREATE TABLE event_config_builds (
+  id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
+  event_id UUID NOT NULL REFERENCES events(id) ON DELETE CASCADE,
+  source_id UUID NOT NULL REFERENCES event_config_sources(id) ON DELETE CASCADE,
+  build_no INTEGER NOT NULL,
+  build_status TEXT NOT NULL DEFAULT 'success' CHECK (build_status IN ('pending', 'running', 'success', 'failed', 'cancelled')),
+  build_log TEXT,
+  manifest_jsonb JSONB NOT NULL DEFAULT '{}'::jsonb,
+  asset_index_jsonb JSONB NOT NULL DEFAULT '[]'::jsonb,
+  created_by_user_id UUID REFERENCES users(id) ON DELETE SET NULL,
+  created_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),
+  UNIQUE (event_id, build_no)
+);
+
+CREATE INDEX event_config_builds_event_id_idx ON event_config_builds(event_id);
+CREATE INDEX event_config_builds_source_id_idx ON event_config_builds(source_id);
+CREATE INDEX event_config_builds_status_idx ON event_config_builds(build_status);
+
+ALTER TABLE event_releases
+ADD COLUMN build_id UUID REFERENCES event_config_builds(id) ON DELETE SET NULL;
+
+CREATE INDEX event_releases_build_id_idx ON event_releases(build_id);
+
+CREATE TABLE event_release_assets (
+  id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
+  event_release_id UUID NOT NULL REFERENCES event_releases(id) ON DELETE CASCADE,
+  asset_type TEXT NOT NULL CHECK (asset_type IN ('manifest', 'mapmeta', 'tiles', 'playfield', 'content_html', 'media', 'other')),
+  asset_key TEXT NOT NULL,
+  asset_path TEXT,
+  asset_url TEXT NOT NULL,
+  checksum TEXT,
+  size_bytes BIGINT,
+  meta_jsonb JSONB NOT NULL DEFAULT '{}'::jsonb,
+  created_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),
+  UNIQUE (event_release_id, asset_key)
+);
+
+CREATE INDEX event_release_assets_release_id_idx ON event_release_assets(event_release_id);
+CREATE INDEX event_release_assets_asset_type_idx ON event_release_assets(asset_type);
+
+COMMIT;