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/alembic/versions/20260730_05_optimization_runs.py

@@ -0,0 +1,42 @@
+"""Add durable optimization workflow state to PostgreSQL."""
+
+from __future__ import annotations
+
+from alembic import op
+
+
+revision = "20260730_05"
+down_revision = "20260724_03"
+branch_labels = None
+depends_on = None
+
+
+def upgrade() -> None:
+    schema = op.get_context().config.get_main_option("resume_agent.schema", "resume_agent")
+    bind = op.get_bind()
+    bind.exec_driver_sql(
+        f'''
+        CREATE TABLE IF NOT EXISTS "{schema}".optimization_runs (
+            id VARCHAR(128) PRIMARY KEY,
+            session_id VARCHAR(128) NOT NULL
+                REFERENCES "{schema}".sessions(id) ON DELETE CASCADE,
+            entry_id VARCHAR(128) NOT NULL,
+            mode VARCHAR(32) NOT NULL,
+            status VARCHAR(32) NOT NULL,
+            source_revision INTEGER NOT NULL CHECK (source_revision >= 1),
+            state JSONB NOT NULL,
+            proposal JSONB,
+            created_at TIMESTAMPTZ NOT NULL,
+            updated_at TIMESTAMPTZ NOT NULL
+        )
+        '''
+    )
+    bind.exec_driver_sql(
+        f'''CREATE INDEX IF NOT EXISTS ix_optimization_runs_active
+        ON "{schema}".optimization_runs (session_id, entry_id, status)'''
+    )
+
+
+def downgrade() -> None:
+    schema = op.get_context().config.get_main_option("resume_agent.schema", "resume_agent")
+    op.get_bind().exec_driver_sql(f'DROP TABLE IF EXISTS "{schema}".optimization_runs')