Consolidate required CI gate (#115)

tools/check_milestone_06.py

@@ -104,11 +104,7 @@ def check_benchmarks_and_ci() -> None:
         if not (crate / "benches" / f"{name}.rs").is_file():
             raise SystemExit(f"missing {name} benchmark source")
 
-    workflows = {
-        "imaging-meshing": ROOT / ".gitea" / "workflows" / "imaging-meshing.yml",
-        "jpeg2000": ROOT / ".gitea" / "workflows" / "jpeg2000.yml",
-        "skia": ROOT / ".gitea" / "workflows" / "skia.yml",
-    }
+    workflows = {"consolidated": ROOT / ".gitea" / "workflows" / "ci.yml"}
     for name, path in workflows.items():
         if not path.is_file():
             raise SystemExit(f"missing {name} native-feature workflow")
@@ -121,6 +117,10 @@ def check_benchmarks_and_ci() -> None:
                 f"{name} workflow must use only ubuntu-latest, found: "
                 + ", ".join(unsupported)
             )
+        text = path.read_text()
+        for marker in ("required-gate", "METACRATE_SKIA_ARCHIVE", "OPENJPEG_PREFIX"):
+            if marker not in text:
+                raise SystemExit(f"{name} workflow is missing {marker}")
 
 
 def main() -> None: