Leave threads unknown when a table gives only a core count

parse_cores_threads("16") returned (16, 16). The Atom and Xeon list pages
have a bare "Cores" column, so Hyper-Threaded parts (Tunnel Creek,
Centerton, Broadwell-EX...) came out with half their real thread count.
Return (16, None) so such rows stay drafts instead of guessing.

Author: Seungpyo1007

app/ingest/normalize.py

@@ -121,15 +121,18 @@ def parse_int(text: str) -> int | None:
 
 
 def parse_cores_threads(text: str) -> tuple[int | None, int | None]:
-    """``"8 / 16"`` → ``(8, 16)``; ``"16"`` → ``(16, 16)`` (assumes SMT)."""
+    """``"8 / 16"`` → ``(8, 16)``; ``"16"`` → ``(16, None)``.
+
+    A bare core count says nothing about SMT, so threads stay unknown rather
+    than guessed (Atom/Xeon tables list "Cores" only; many of those parts have HT).
+    """
     if not text:
         return (None, None)
     nums = re.findall(r"\d+", text)
     if not nums:
         return (None, None)
     if len(nums) == 1:
-        cores = int(nums[0])
-        return (cores, cores)
+        return (int(nums[0]), None)
     return (int(nums[0]), int(nums[1]))
 
 

tests/unit/test_ingest_normalize.py

@@ -86,7 +86,7 @@ def test_parse_cache_mb(text: str, expected: float | None) -> None:
     "text,expected",
     [
         ("8 / 16", (8, 16)),
-        ("16", (16, 16)),
+        ("16", (16, None)),
         ("24/32", (24, 32)),
         ("", (None, None)),
     ],