Expire retained file bodies and reclaim SQLite storage

src/lib/server/hosts/schema.ts

@@ -1,5 +1,6 @@
 import { createHash } from 'node:crypto';
 import { ensureFileBlobSchema, migrationRows, packFileJson, referenceBlobs } from '../db/file-blobs.js';
+import { retentionClocks } from '../db/retention-clocks.js';
 import type Database from 'better-sqlite3';
 import { successfulObservationSql, routineObservationSql, operationTargetSql, importantOperationSql } from './observations.js';
 
@@ -185,5 +186,6 @@ export function ensureHostSchema(handle: Database.Database): void {
         CREATE TRIGGER IF NOT EXISTS expire_operation_blobs AFTER UPDATE OF history_expired_at ON ec_host_operations
         WHEN NEW.history_expired_at IS NOT NULL BEGIN
         DELETE FROM file_blob_references WHERE owner_type IN ('operation','operation-result') AND owner_id=NEW.id; END;`);
+    retentionClocks(handle, { ec_host_operations: ['created_at', 'updated_at'] });
     initialized.add(handle);
 }