feat: implement media metadata management with EXIF and TrackInfo support

libertas_api/migrations/20251114055511_create_media_metadata_table.sql

@@ -0,0 +1,11 @@
+
+CREATE TABLE media_metadata (
+    id UUID PRIMARY KEY,
+    media_id UUID NOT NULL REFERENCES media (id) ON DELETE CASCADE,
+    source TEXT NOT NULL,
+    tag_name TEXT NOT NULL,
+    tag_value TEXT NOT NULL
+);
+
+CREATE INDEX idx_media_metadata_media_id ON media_metadata (media_id);
+CREATE INDEX idx_media_metadata_tag_name_value ON media_metadata (tag_name, tag_value);