feat: builder 简历生成 + 轻度优化 + 简历导入交付副本

自内部仓库剥离深度优化与 RAG 知识库后的交付版本：
- Builder 对话式简历生成（FSM + 意图路由 LLM 兜底增强）
- 条目级轻度优化：事实覆盖门禁 + STAR/bullet 修复链，功能/简介/成果与技术栈同级保护
- 简历导入：DOCX/PDF 解析、结构归一、手机号脱敏
- PostgreSQL 运行时 + Alembic 迁移链

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

backend/tests/test_entry_gap_report.py

@@ -0,0 +1,72 @@
+"""Entry-level gap report persistence and staleness detection."""
+
+from app.resume_document_core import (
+    attach_gap_report_staleness,
+    entry_fingerprint,
+    find_entry,
+    gap_report_is_stale,
+)
+from app.resume_document_mutations import set_entry_gap_report
+
+
+def _content() -> dict:
+    return {
+        "sections": [
+            {
+                "id": "sec1",
+                "kind": "project_experience",
+                "items": [{"id": "e1", "project_name": "项目 A", "description": "完成了开发。"}],
+            }
+        ]
+    }
+
+
+GAPS = [
+    {
+        "dimension": "quantified_outcome",
+        "severity": 4,
+        "askability": 0.5,
+        "job_weight": 3,
+        "evidence": "缺少量化成果。",
+        "value": 6.0,
+    }
+]
+
+
+def test_set_entry_gap_report_does_not_change_fingerprint() -> None:
+    content = _content()
+    before = entry_fingerprint(find_entry(content, "e1")[1])
+
+    content = set_entry_gap_report(content, "e1", GAPS)
+
+    entry = find_entry(content, "e1")[1]
+    assert entry["gap_report"]["gaps"] == GAPS
+    assert entry["gap_report"]["based_on"] == before
+    assert entry_fingerprint(entry) == before
+    assert gap_report_is_stale(entry) is False
+
+
+def test_gap_report_stale_after_entry_edit() -> None:
+    content = set_entry_gap_report(_content(), "e1", GAPS)
+    entry = find_entry(content, "e1")[1]
+
+    entry["description"] = "手动编辑后的描述。"
+
+    assert gap_report_is_stale(entry) is True
+
+
+def test_gap_report_missing_is_not_stale() -> None:
+    entry = find_entry(_content(), "e1")[1]
+
+    assert gap_report_is_stale(entry) is False
+
+
+def test_attach_gap_report_staleness_returns_a_presentation_copy() -> None:
+    content = set_entry_gap_report(_content(), "e1", GAPS)
+    entry = find_entry(content, "e1")[1]
+    entry["description"] = "已编辑。"
+
+    presentation = attach_gap_report_staleness(content)
+
+    assert find_entry(presentation, "e1")[1]["gap_report"]["stale"] is True
+    assert "stale" not in find_entry(content, "e1")[1]["gap_report"]