新岗位发现：增长率改双年窗口口径（修复成熟岗位被误杀），测试对齐四指标阈值

tests/test_persistence.py

@@ -172,7 +172,7 @@ def test_discover_candidate_carries_support_evidence():
     from app.models import ExtractionResult
 
     records, extractions = [], {}
-    for i in range(9):
+    for i in range(15):  # ≥ MIN_CLUSTER_SIZE(15)，5 家企业 ≥ MIN_COMPANIES(5)
         r = JDRecord(jid=f"c{i}", job_title="提示词工程师", company=f"公司{i % 5}",
                      industry="人工智能", publish_date=date(2025, i % 6 + 1, 1),
                      text="负责大模型提示词设计与优化", source_id=f"t.jsonl#{i + 1}")
@@ -183,7 +183,7 @@ def test_discover_candidate_carries_support_evidence():
     cands = cluster.discover_new_jobs(records, extractions, known_titles=set())
     assert len(cands) == 1
     c = cands[0]
-    assert len(c.support_source_ids) == 9
+    assert len(c.support_source_ids) == 15
     assert min(c.support_windows) == "2025Q1"
     assert c.industries == ["人工智能"]