feat: add sidecar + processing migrations and postgres adapters

007_sidecar, 008_processing, 009_duplicate_groups migrations.
Tag, sidecar, job, batch, plugin, pipeline, duplicate repos.

crates/adapters/postgres/migrations/007_sidecar.sql

@@ -0,0 +1,8 @@
+CREATE TABLE sidecar_records (
+    asset_id             UUID PRIMARY KEY REFERENCES assets(asset_id),
+    sync_status          TEXT NOT NULL DEFAULT 'pending_write',
+    sidecar_storage_path TEXT NOT NULL,
+    last_synced_at       TIMESTAMPTZ,
+    last_known_file_hash TEXT,
+    error_message        TEXT
+);