fix(rank): keep every --exclude key out of the sweep when the list has spaces (#641)

* fix(rank): keep every --exclude key out of the sweep when the list has spaces

`sweep --exclude "a_b, c_d"` split on bare commas, so " c_d" matched no
entry and every key after the first was swept. On an --all run that
expired a re-scored entry whose fresh deadline apply then re-ranked, so
the report listed it as both expired and shortlisted. Strip each key.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

* changelog: place the #641 entry under [Unreleased]

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

---------

Co-authored-by: Claude Opus 5.5 <noreply@anthropic.com>
Co-authored-by: Mads Lorentzen <madslorentzen_17@hotmail.com>

tests/test_rank_state.py

@@ -259,6 +259,19 @@ class Sweep(RankStateCase):
         self.assertEqual(out["swept"], 1)
         self.assertEqual(self.read_state()["new_past"]["status"], "new")
 
+    def test_excluded_keys_tolerate_spaces_after_commas(self):
+        self.write_state(
+            {
+                "a": entry(status="ranked", deadline="2026-09-01"),
+                "b": entry(status="ranked", deadline="2026-09-01"),
+                "other": entry(status="ranked", deadline="2026-09-01"),
+            }
+        )
+        out = self.run_tool("sweep", "--write", "--exclude", "a, b")
+        self.assertEqual([r["key"] for r in out["newly_expired"]], ["other"])
+        self.assertEqual(out["swept"], 1)
+        self.assertEqual(self.read_state()["b"]["status"], "ranked", "a key scored this run is never swept")
+
     def test_without_write_nothing_is_persisted(self):
         self.write_state({"past": entry(status="ranked", deadline="2026-09-01")})
         out = self.run_tool("sweep")