fix(rectification): stop yearless ungrounded varga contrast from minting cards

Only sign-bound varga_style questions may omit a concrete period. Remaining-layer existence and quality probes now drop as yearless_ungrounded_contrast instead of scoring by group order.

Co-authored-by: Cursor <cursoragent@cursor.com>

tests/test_probe_question_contract.py

@@ -59,6 +59,60 @@ class ProbeQuestionContractTests(unittest.TestCase):
         self.assertFalse(result["ok"])
         self.assertEqual(result.get("reason"), "forbidden_copy")
 
+    def test_yearless_ungrounded_contrast_is_rejected(self) -> None:
+        existence = is_renderable_probe({
+            "information_gain": 1.2,
+            "candidate_ids": ["05:00", "05:04"],
+            "expected_outcomes": [{}, {}],
+            "choice_kind": "existence",
+            "year": 0,
+        })
+        self.assertFalse(existence["ok"])
+        self.assertEqual(existence.get("reason"), "yearless_ungrounded_contrast")
+        quality = is_renderable_probe({
+            "information_gain": 1.2,
+            "candidate_ids": ["05:00", "05:04"],
+            "expected_outcomes": [{}, {}],
+            "choice_kind": "event_quality",
+            "year": 0,
+        })
+        self.assertFalse(quality["ok"])
+        self.assertEqual(quality.get("reason"), "yearless_ungrounded_contrast")
+        signed = is_renderable_probe({
+            "information_gain": 1.2,
+            "candidate_ids": ["05:00", "05:04"],
+            "expected_outcomes": [{}, {}],
+            "choice_kind": "varga_style",
+            "year": 0,
+            "style_options": [
+                {"label": "做事以照顾人为主，在意团队里的感受", "answer_class": "yes", "sign": "巨蟹座"},
+                {"label": "习惯带头，也不排斥站到台前", "answer_class": "weak_yes", "sign": "狮子座"},
+            ],
+        })
+        self.assertTrue(signed["ok"])
+        unsigned = is_renderable_probe({
+            "information_gain": 1.2,
+            "candidate_ids": ["05:00", "05:04"],
+            "expected_outcomes": [{}, {}],
+            "choice_kind": "varga_style",
+            "year": 0,
+            "style_options": [
+                {"label": "做事以照顾人为主，在意团队里的感受", "answer_class": "yes"},
+                {"label": "习惯带头，也不排斥站到台前", "answer_class": "weak_yes"},
+            ],
+        })
+        self.assertFalse(unsigned["ok"])
+        self.assertEqual(unsigned.get("reason"), "yearless_ungrounded_contrast")
+        dated = is_renderable_probe({
+            "information_gain": 1.2,
+            "candidate_ids": ["05:00", "05:04"],
+            "expected_outcomes": [{}, {}],
+            "choice_kind": "existence",
+            "year": 2016,
+            "year_label": "2016 年前后",
+        })
+        self.assertTrue(dated["ok"])
+
     def test_duplicate_labels_uniquify_with_index(self) -> None:
         completed = complete_style_options("varga_style", [
             {"label": "相处主动热情", "answer_class": "yes"},