feat(rectification): range delivery needs 4 dated events across 3 domains (R1, BUG-1193)

Product decision 2026-10-02 (TASK-upstream-sync5 R1): a time range is offered
only with at least 4 dated, primary-scoreable events covering 3 domains,
counted on all of them (training + reserved holdout). Was 3 training events /
2 domains in three TS copies and the Python acceptance gate while the policy
file already said 4/3.

- One definition: references/rectification_policy.v1.json
  (minConfirmationEvents / minConfirmationDomains). TS core/types MIN_DATED_*,
  rectification-decision MIN_STANDALONE_*, evidence-model MIN_ACCEPTANCE_*,
  the convergence evaluator and the post-inference trainingGateOpen all read
  it; Python decision_policy MIN_ACCEPTANCE_* alias MIN_CONFIRMATION_*.
- Python receipt counts all scoreable events / domains for event_quality and
  domain_diversity; decision policy identity v3 -> v4 (candidate UUIDs carry
  it). Candidate scores unchanged (77 v5 cases A/B identical), so the
  algorithm stays rectification-v5-matrix-scoring-10.
- Memoization golden v3 written by write_golden; v2 frozen by sha256 with a
  test that its scores equal v3 and only the receipt policy moved.
- Collect gap copy names the exact gap ("再来两件……其中至少一件不是……")
  instead of always "再来一件"; VOICE.md updated. Legacy life-events form copy
  4/3 as well.
- 30 frontend test files, 4 Python tests: fixtures extended to the same
  scenario at 4/3, or assertions changed with 原值/新值/原因 notes.

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01N4f2nya58RoRu4yEmJgRGE

tests/test_rectification_relative_support.py

@@ -18,7 +18,8 @@ def _row(time: str, score: float) -> dict:
 
 class RelativeSupportScaleTest(unittest.TestCase):
     def test_holdout_gate_keeps_proportional_default(self) -> None:
-        self.assertEqual(POLICY_VERSION, "rectification-candidate-policy-v3")
+        # 原值: policy-v3；新值: policy-v4；原因: R1 区间门槛 4 件 3 域（BUG-1193），相对支持口径不变。
+        self.assertEqual(POLICY_VERSION, "rectification-candidate-policy-v4")
         # Explicit date windows: scoring identity -8 -> -9, not a prior/policy change.
         # 原值: -9；新值: -10；原因: 功能吉凶 v2 改变打分（BUG-1181），策略 v3 与相对支持口径不变。
         self.assertEqual(ALGORITHM_VERSION, "rectification-v5-matrix-scoring-10")