chore: initial commit — leaudit-platform project skeleton

17-table PostgreSQL schema with full Chinese column comments,
FastAPI project structure (admin/common/modules),
DSL rule files, and schema migration scripts.

rules/contract_evaluation/rules.yaml

@@ -0,0 +1,136 @@
+metadata:
+  type_id: contract.evaluation.delegation
+  name: 委托评估合同
+  version: '0.1'
+  last_updated: '2026-04-14'
+  parent: contract
+  classification_keywords:
+  - 委托评估
+  - 评估合同
+  - 房地产评估
+  description: '最小规则集，用于端到端验证印章 / 签名 / 齐缝章识别流水线。
+
+    '
+extract:
+- group: 默认分组
+  fields:
+  - name: 甲方名称
+    type: string
+    required_from: draft
+    desc: 委托估价方（甲方）全称
+    deep_retry: false
+  - name: 乙方名称
+    type: string
+    required_from: draft
+    desc: 受托估价方（乙方、评估机构）全称
+    deep_retry: false
+visual_elements:
+  seals:
+  - id: 乙方评估机构章
+    name: 乙方合同专用章 / 公章
+    required: true
+    required_from: executed
+    allowed_types:
+    - 合同专用章
+    - 公章
+  signatures:
+  - id: 甲乙方代理人签名
+    name: 甲方 / 乙方法定代表人或代理人手写签名
+    required: true
+    required_from: executed
+  cross_page_seals:
+  - id: 齐缝章
+    name: 页间齐缝章
+    required: true
+    required_from: executed
+rules:
+- group: 印章合规
+  rules:
+  - rule_id: EVAL-SEAL-001
+    name: 合同存在合同专用章或公章
+    risk: high
+    score: 10
+    applies_in:
+    - executed
+    stages:
+    - id: '1'
+      check: visual
+      element: seal
+      expect: type_in
+      allowed_types:
+      - 合同专用章
+      - 公章
+    logic: '1'
+    messages:
+      pass: 检测到合同专用章或公章
+      fail: 未检测到合同专用章或公章
+    type: deterministic
+  - rule_id: EVAL-SEAL-002
+    name: 乙方评估机构章文字匹配
+    risk: medium
+    score: 10
+    applies_in:
+    - executed
+    stages:
+    - id: '1'
+      check: visual
+      element: seal
+      expect: text_match
+      expected_text: 广东博亿美房地产资产评估有限公司 合同专用章 4453020060917
+    logic: '1'
+    messages:
+      pass: 乙方合同专用章文字命中
+      fail: 乙方合同专用章文字未命中
+    type: deterministic
+  - rule_id: EVAL-CROSS-001
+    name: 存在齐缝章
+    risk: high
+    score: 10
+    applies_in:
+    - executed
+    stages:
+    - id: '1'
+      check: visual
+      element: cross_page_seal
+      expect: present
+      min_count: 1
+    logic: '1'
+    messages:
+      pass: 检测到齐缝章
+      fail: 未检测到齐缝章
+    type: deterministic
+  - rule_id: EVAL-CROSS-002
+    name: 齐缝章两侧对齐且完整
+    risk: medium
+    score: 10
+    applies_in:
+    - executed
+    stages:
+    - id: '1'
+      check: visual
+      element: cross_page_seal
+      expect: complete
+    logic: '1'
+    messages:
+      pass: 齐缝章两半对齐且完整
+      fail: 齐缝章仅检测到单侧，无法判定完整性
+    type: deterministic
+- group: 签字合规
+  rules:
+  - rule_id: EVAL-SIGN-001
+    name: 合同尾页存在手写签名
+    risk: high
+    score: 10
+    applies_in:
+    - executed
+    stages:
+    - id: '1'
+      check: visual
+      element: signature
+      expect: present
+      min_count: 2
+    logic: '1'
+    messages:
+      pass: 合同存在甲乙双方的手写签名（≥2）
+      fail: 合同缺少甲方或乙方的手写签名
+    type: deterministic