refactor(server): 单号规则收紧为 A/R/D+8 位紧凑格式

- DOCUMENT_NUMBER_PREFIXES 改为 A/R/D，新增短格式与旧格式正则并存识别，提取正则加边界锚定避免误匹配
- build_document_number 去掉时间戳段，统一生成 A+token 等紧凑单号，is_application_claim_no 兼容旧 AP-/APP- 前缀
- access_policy/status_registry/reimbursements/expense_claims/budget_support 统一复用 is_application_claim_no 判定申请单
- 同步 document_numbering 单元测试覆盖新旧两种格式

server/src/app/services/document_numbering.py

@@ -2,7 +2,7 @@ from __future__ import annotations
 
 import re
 import secrets
-from datetime import UTC, datetime
+from datetime import datetime
 from typing import Callable, Literal
 
 from sqlalchemy import select
@@ -13,20 +13,29 @@ from app.models.financial_record import ExpenseClaim
 DocumentNumberKind = Literal["application", "reimbursement", "audit"]
 
 DOCUMENT_NUMBER_PREFIXES: dict[DocumentNumberKind, str] = {
-    "application": "AP",
-    "reimbursement": "RE",
-    "audit": "AD",
+    "application": "A",
+    "reimbursement": "R",
+    "audit": "D",
 }
 DOCUMENT_NUMBER_TOKEN_ALPHABET = "ABCDEFGHJKLMNPQRSTUVWXYZ23456789"
 DOCUMENT_NUMBER_TOKEN_LENGTH = 8
+DOCUMENT_NUMBER_SHORT_BODY = (
+    rf"(?:A|R|D)[{DOCUMENT_NUMBER_TOKEN_ALPHABET}]{{{DOCUMENT_NUMBER_TOKEN_LENGTH}}}"
+)
+DOCUMENT_NUMBER_LEGACY_BODY = (
+    rf"(?:AP|RE|AD)-\d{{14}}-[{DOCUMENT_NUMBER_TOKEN_ALPHABET}]{{{DOCUMENT_NUMBER_TOKEN_LENGTH}}}"
+)
 DOCUMENT_NUMBER_PATTERN = re.compile(
-    rf"^(?:AP|RE|AD)-\d{{14}}-[{DOCUMENT_NUMBER_TOKEN_ALPHABET}]{{{DOCUMENT_NUMBER_TOKEN_LENGTH}}}$",
+    rf"^(?:{DOCUMENT_NUMBER_SHORT_BODY}|{DOCUMENT_NUMBER_LEGACY_BODY})$",
     flags=re.IGNORECASE,
 )
 DOCUMENT_NUMBER_EXTRACT_PATTERN = re.compile(
-    rf"(?:AP|RE|AD)-\d{{14}}-[{DOCUMENT_NUMBER_TOKEN_ALPHABET}]{{{DOCUMENT_NUMBER_TOKEN_LENGTH}}}"
+    rf"(?<![A-Z0-9])(?:"
+    rf"{DOCUMENT_NUMBER_SHORT_BODY}"
+    rf"|{DOCUMENT_NUMBER_LEGACY_BODY}"
     r"|APP-\d{8}-[A-Z0-9]{6}"
-    r"|EXP-\d{6}-\d{3}",
+    r"|EXP-\d{6}-\d{3}"
+    r")(?![A-Z0-9])",
     flags=re.IGNORECASE,
 )
 
@@ -45,16 +54,13 @@ def build_document_number(
     token: str | None = None,
 ) -> str:
     prefix = DOCUMENT_NUMBER_PREFIXES[kind]
-    generated_at = timestamp or datetime.now(UTC)
-    if generated_at.tzinfo is None:
-        generated_at = generated_at.replace(tzinfo=UTC)
     normalized_token = (token or generate_document_token()).strip().upper()
     if not re.fullmatch(
         rf"[{DOCUMENT_NUMBER_TOKEN_ALPHABET}]{{{DOCUMENT_NUMBER_TOKEN_LENGTH}}}",
         normalized_token,
     ):
         raise ValueError("document number token must be 8 chars from the configured alphabet")
-    return f"{prefix}-{generated_at.astimezone(UTC):%Y%m%d%H%M%S}-{normalized_token}"
+    return f"{prefix}{normalized_token}"
 
 
 def generate_unique_expense_claim_no(
@@ -83,4 +89,9 @@ def generate_unique_expense_claim_no(
 
 def is_application_claim_no(value: object) -> bool:
     normalized = str(value or "").strip().upper()
-    return normalized.startswith(("AP-", "APP-"))
+    return bool(
+        re.fullmatch(
+            rf"A[{DOCUMENT_NUMBER_TOKEN_ALPHABET}]{{{DOCUMENT_NUMBER_TOKEN_LENGTH}}}",
+            normalized,
+        )
+    ) or normalized.startswith(("AP-", "APP-"))