fix(sdmx_series_ecb_icp): strip flow-id prefix from series keys

sdmx_series_ecb_icp/meta.json

@@ -39,8 +39,8 @@
   "build": {
     "built_at": "2026-06-18T22:31:30.087589Z",
     "parsimony_version": null,
-    "builder": null,
-    "content_sha256": "8ad4299276cb7caf0935e609e408bba75cb75341e740a8f9c157dfded60d0a9e",
+    "builder": "strip-ecb-flow-prefix-keys",
+    "content_sha256": "2f58ce15a532a0ebd217b6b34f479658c960262a4e569396a70af785f47dd6a5",
     "manifest_contract_sha256": "19869dc0d80d19cb3214577ec2032b86b6efc8b2b4770d6ddb23ccbad6fda237"
   }
 }

sdmx_series_ecb_icp/series.parquet

@@ -1,3 +1,3 @@
 version https://git-lfs.github.com/spec/v1
-oid sha256:43fffcce6a39cd1c258db75da89b0d82f82368d2cdfc3dc19d5363f4621135c6
-size 1000605
+oid sha256:8b430bceb8ba9b295a2506a4ca1c6434716514d717e62cb734a63427dd93292d
+size 1723743