fix: cite primehack's Realtek loader at its pin

A comment named the Bluetooth directory twice, a path no revision
holds, and every firmware ref sat ten lines above the case it meant.
Each now cites its case and return at the pinned commit. The schema
check reads profiles as text and refuses a citation that repeats
its own directories.

scripts/validate_schemas.py

@@ -59,6 +59,7 @@ def _validate_yaml_directory(
         out.extend(_unreachable_citations(path, data))
         if schema_name == "emulator.schema.json":
             out.extend(_checks_without_values(path, data))
+            out.extend(_doubled_paths(path))
     return out
 
 
@@ -202,6 +203,27 @@ def _unreachable_citations(path: Path, document: object) -> list[str]:
     return out
 
 
+_DOUBLED_PATH = re.compile(r"((?:[\w.-]+/){2,})\1")
+
+
+def _doubled_paths(path: Path) -> list[str]:
+    """A citation whose directory is written twice in a row.
+
+    Read from the raw text, comments included: primehack's note on the
+    Realtek loader cited Source/Core/Core/IOS/USB/Bluetooth/ twice over, a
+    path no revision holds, in a comment the parsed document never shows.
+    """
+    out: list[str] = []
+    for number, line in enumerate(path.read_text(encoding="utf-8").splitlines(), 1):
+        match = _DOUBLED_PATH.search(line)
+        if match:
+            out.append(
+                f"{path.relative_to(ROOT)}:{number}: citation repeats its "
+                f"directory: {match.group(1)}"
+            )
+    return out
+
+
 def _unknown_data_dir_refs() -> list[str]:
     """data_directories refs the registry does not define.