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/env.py

@@ -0,0 +1,48 @@
+from __future__ import annotations
+
+from alembic import context
+from sqlalchemy import engine_from_config, pool
+
+from app.db.schema import build_session_tables
+
+
+config = context.config
+schema = config.get_main_option("resume_agent.schema", "resume_agent")
+target_metadata, _ = build_session_tables(schema)
+
+
+def run_migrations_offline() -> None:
+    context.configure(
+        url=config.get_main_option("sqlalchemy.url"),
+        target_metadata=target_metadata,
+        include_schemas=True,
+        version_table_schema=schema,
+        literal_binds=True,
+    )
+    with context.begin_transaction():
+        context.run_migrations()
+
+
+def run_migrations_online() -> None:
+    connectable = engine_from_config(
+        config.get_section(config.config_ini_section, {}),
+        prefix="sqlalchemy.",
+        poolclass=pool.NullPool,
+    )
+    with connectable.connect() as connection:
+        connection.exec_driver_sql(f'CREATE SCHEMA IF NOT EXISTS "{schema}"')
+        connection.commit()
+        context.configure(
+            connection=connection,
+            target_metadata=target_metadata,
+            include_schemas=True,
+            version_table_schema=schema,
+        )
+        with context.begin_transaction():
+            context.run_migrations()
+
+
+if context.is_offline_mode():
+    run_migrations_offline()
+else:
+    run_migrations_online()

backend/alembic/versions/20260724_01_core_resume_agent.py

@@ -0,0 +1,25 @@
+"""Create the PostgreSQL core persistence schema."""
+
+from __future__ import annotations
+
+from alembic import op
+
+from app.db.schema import build_session_tables
+
+
+revision = "20260724_01"
+down_revision = None
+branch_labels = None
+depends_on = None
+
+
+def upgrade() -> None:
+    schema = op.get_context().config.get_main_option("resume_agent.schema", "resume_agent")
+    op.execute(f'CREATE SCHEMA IF NOT EXISTS "{schema}"')
+    metadata, _ = build_session_tables(schema)
+    metadata.create_all(op.get_bind())
+
+
+def downgrade() -> None:
+    schema = op.get_context().config.get_main_option("resume_agent.schema", "resume_agent")
+    op.execute(f'DROP SCHEMA IF EXISTS "{schema}" CASCADE')

backend/alembic/versions/20260724_03_resume_imports.py

@@ -0,0 +1,46 @@
+"""Add durable reviewable resume import metadata to PostgreSQL."""
+
+from __future__ import annotations
+
+from alembic import op
+
+
+revision = "20260724_03"
+down_revision = "20260724_01"
+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}".resume_imports (
+            id VARCHAR(128) PRIMARY KEY,
+            session_id VARCHAR(128) NOT NULL
+                REFERENCES "{schema}".sessions(id) ON DELETE CASCADE,
+            file_name VARCHAR(512) NOT NULL,
+            mime_type VARCHAR(128) NOT NULL,
+            size_bytes INTEGER NOT NULL CHECK (size_bytes >= 0),
+            sha256 VARCHAR(64) NOT NULL,
+            object_key VARCHAR(512) NOT NULL,
+            status VARCHAR(32) NOT NULL,
+            document JSONB,
+            field_reviews JSONB NOT NULL DEFAULT '[]'::jsonb,
+            error_code VARCHAR(128),
+            created_at TIMESTAMPTZ NOT NULL,
+            updated_at TIMESTAMPTZ NOT NULL,
+            CONSTRAINT uq_resume_import_session_sha256 UNIQUE (session_id, sha256)
+        )
+        '''
+    )
+    bind.exec_driver_sql(
+        f'''CREATE INDEX IF NOT EXISTS ix_resume_imports_session_created
+        ON "{schema}".resume_imports (session_id, created_at)'''
+    )
+
+
+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}".resume_imports')

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')