fix(sdmx_series_ecb_inw): refresh content digest after key strip

sdmx_series_ecb_inw/meta.json

@@ -45,8 +45,8 @@
   "build": {
     "built_at": "2026-06-18T22:31:40.996219Z",
     "parsimony_version": null,
-    "builder": null,
-    "content_sha256": "87a48ed03a089e74f01976ef7d3f7f5c795e2e99aae92a805dd2aa9f0b2da2d2",
+    "builder": "strip-ecb-flow-prefix-keys",
+    "content_sha256": "b00ef110e231bf61ea36ace6a6fa6b9fd00aca36f8cf3a72f3f53b0307b1b119",
     "manifest_contract_sha256": "aec3fc8d6ba579e4822d66361706a2605b126a3aee78bc61558c75742c598601"
   }
 }