feat(workspace,jobs): emit sync_aborted_on_restart audit + enrich worktree.pruned metadata

- workspace.ResetStuckSyncStatuses now returns affected IDs so app.New can record one workspace.sync_aborted_on_restart audit per reset row
- worktree_prune audit metadata gains workspace_id and path alongside existing branch
- updated fakeRepo + integration test for new ResetStuckSyncStatuses signature
- add TestWorktreePrune_AuditMetadataContainsWorkspaceIDAndPath

internal/workspace/queries/workspaces.sql

@@ -35,12 +35,13 @@ RETURNING *;
 -- name: DeleteWorkspace :exec
 DELETE FROM workspaces WHERE id = $1;
 
--- name: ResetStuckSyncStatuses :exec
+-- name: ResetStuckSyncStatuses :many
 UPDATE workspaces
 SET sync_status = 'error',
     last_sync_error = 'process_restarted_during_' || sync_status,
     updated_at = now()
-WHERE sync_status IN ('cloning', 'syncing');
+WHERE sync_status IN ('cloning', 'syncing')
+RETURNING id, last_sync_error;
 
 -- name: ListFetchTargets :many
 SELECT w.id, p.owner_id, w.name, w.main_path