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/app/resume_import_models.py

@@ -0,0 +1,50 @@
+"""Contracts for reviewable PDF/DOCX resume imports."""
+
+from __future__ import annotations
+
+from datetime import datetime
+from typing import Any, Literal
+
+from pydantic import BaseModel, ConfigDict, Field
+
+
+class ImportEvidence(BaseModel):
+    page: int | None = Field(default=None, ge=1)
+    paragraph: int | None = Field(default=None, ge=1)
+    text: str = Field(min_length=1, max_length=500)
+
+
+class ImportFieldReview(BaseModel):
+    field_path: str = Field(min_length=1, max_length=256)
+    value: Any
+    confidence: float = Field(ge=0, le=1)
+    status: Literal["needs_review", "verified"] = "needs_review"
+    evidence: list[ImportEvidence] = Field(min_length=1, max_length=10)
+
+
+class ParsedResumeDraft(BaseModel):
+    model_config = ConfigDict(extra="forbid")
+
+    document: dict[str, Any]
+    field_reviews: list[ImportFieldReview] = Field(default_factory=list)
+
+
+class ResumeImportView(BaseModel):
+    id: str
+    session_id: str
+    file_name: str
+    mime_type: str
+    size_bytes: int
+    sha256: str
+    status: Literal["awaiting_review", "applied", "failed", "cancelled"]
+    document: dict[str, Any] | None = None
+    field_reviews: list[ImportFieldReview] = Field(default_factory=list)
+    error_code: str | None = None
+    created_at: datetime
+    updated_at: datetime
+
+
+class ApplyResumeImportRequest(BaseModel):
+    model_config = ConfigDict(extra="forbid")
+
+    expected_revision: int = Field(ge=0)