fix: name the export reports as copied files

scripts/generate_site.py

@@ -2157,8 +2157,8 @@ def generate_data_page(exports: list[dict], measurements_sqlite: Path | None = N
         "",
         *(f"- [`{name}`](api/v1/schemas/{name}): {title}" for name, title in _served_schemas()),
         "",
-        "`database.json`, `stats.json`, `release.json` and the manifests are not "
-        "envelopes. Their revision is the `commit` of `catalog.json` that lists "
+        "`database.json`, `stats.json`, `release.json`, the manifests and the export reports "
+        "are not envelopes. Their revision is the `commit` of `catalog.json` that lists "
         "their SHA256.",
         "",
         "One emulator profile without the whole list: "

tests/test_site_r3_reference.py

@@ -267,7 +267,7 @@ class EveryEnvelopeCarriesTheCommit(unittest.TestCase):
             raise unittest.SkipTest("not a git checkout")
         lacking = [
             path.relative_to(API).as_posix() for path in sorted(API.rglob("*.json"))
-            if path.parent.name not in ("schemas", "manifests", "targets")
+            if path.parent.name not in ("schemas", "manifests", "targets", "exports")
             and path.name not in ("database.json", "stats.json", "release.json")
             and "commit" not in json.loads(path.read_text())
         ]