v1.1.0: 实现核心业务逻辑（扫描/任务书/派发/状态机）

新增（scripts/ 分层完整实现）：
- scripts/util/{constants,date_util,runtime_paths,logging_setup}.py
- scripts/db/{connection,seed_data,repository}.py（SQLite + 5 张表 + 50 份样例合同）
- scripts/service/{scanner,task_generator,dispatcher,html_renderer}.py
- scripts/cli/app.py（argparse 子命令）
- scripts/templates/task.html.j2（Jinja2 渲染，无 jinja2 时降级到 str.replace）
- examples/{contracts_sample,performance_sample}.csv（本地样例数据）

修改：
- scripts/main.py：argparse + jiangchang_skill_core 降级
- SKILL.md：version 1.0.1 → 1.1.0
- CHANGELOG.md：加 v1.1.0 条目
- .env.example：加 DB_PATH / HTML_OUTPUT_DIR / JIANGCHANG_DATA_DIR

本地验证（9 个 CLI 命令全部 exit code = 0）：
- health / version / config-path / init-db：基础 4 命令
- scan-expiring-contracts --thresholds 90,60,30：42 份可续聘 → 红 10 / 橙 10 / 黄 10，生成 30 任务
- render-html：写 output/<task_id>.html（4.9 KB）
- generate-renewal-task：单份合同任务书生成
- mark-contract-renewed：状态机更新 + 关闭 open alerts
- dispatch-task-notice：按单位/月份派发 payload（dry-run 模式）

业务规则（AI 续聘建议本地版，规则顺序判断）：
1. 师德 < 60 → non_renew
2. 近 3 年考核有不合格（< 60）→ observe
3. 全部 >= 80 且逐年上升 → renew
4. 其他 → observe

Co-Authored-By: Claude Code <noreply@anthropic.com>

scripts/service/dispatcher.py

@@ -0,0 +1,123 @@
+"""派发器：按单位/月份汇总任务 → 生成派发 payload JSON → 写派发日志。
+
+v1.1.0 dry-run 模式：payload 写 data/dispatch/{unit}_{month}.json，
+但**不真正调用企业微信 API**。开发者后续接入：
+- 真实 API：调用 WECOM_API_BASE_URL + WECOM_API_TOKEN
+- 在 dispatch_log 写 status='sent' 而非 'dry_run'
+"""
+
+from __future__ import annotations
+
+import json
+import sqlite3
+import uuid
+from datetime import datetime
+from pathlib import Path
+
+from db import repository as repo
+from util.date_util import parse_iso_date
+from util.logging_setup import get_skill_logger
+from util.runtime_paths import get_dispatch_dir
+
+logger = get_skill_logger()
+
+
+def build_payload(
+    conn: sqlite3.Connection,
+    unit_id: str,
+    month: str = "",
+) -> dict:
+    """构建派发 payload：含单位、月份、任务清单、收件人、消息正文。"""
+    rows = repo.list_open_alerts_by_unit_month(conn, unit_id, month)
+
+    # 单位名（取第一条）
+    unit_name = rows[0]["unit_name"] if rows else "(无)"
+
+    items = []
+    for r in rows:
+        items.append({
+            "contract_id": r["contract_id"],
+            "teacher_name": r["teacher_name"],
+            "alert_level": r["alert_level"],
+            "days_to_expire": r["days_to_expire"],
+            "contract_end": r["contract_end"],
+        })
+
+    if month:
+        title = f"{unit_name} {month} 合同到期人员清单及续聘建议"
+    else:
+        title = f"{unit_name} 待续聘合同清单"
+
+    body_lines = [
+        title,
+        "",
+        f"共 {len(items)} 份合同需在到期前办理续聘手续。",
+        "",
+    ]
+    for it in items:
+        level_zh = {"yellow": "黄色", "orange": "橙色", "red": "红色"}.get(
+            it["alert_level"], it["alert_level"]
+        )
+        body_lines.append(
+            f"- {it['teacher_name']}（合同至 {it['contract_end']}，{level_zh}预警，距到期 {it['days_to_expire']} 天）"
+        )
+    body_lines.append("")
+    body_lines.append("请人事秘书尽快通知相关教师备齐续聘材料。")
+
+    payload = {
+        "schema_version": 1,
+        "channel": "wecom",
+        "dry_run": True,
+        "to": {
+            "unit_id": unit_id,
+            "unit_name": unit_name,
+            "role": "人事秘书",
+        },
+        "title": title,
+        "body": "\n".join(body_lines),
+        "items": items,
+        "generated_at": datetime.now().isoformat(timespec="seconds"),
+    }
+    return payload
+
+
+def dispatch(
+    conn: sqlite3.Connection,
+    unit_id: str,
+    month: str = "",
+) -> dict:
+    """派发 dry-run：写 payload 文件 + 写 dispatch_log。"""
+    payload = build_payload(conn, unit_id, month)
+    items = payload["items"]
+    task_ids = [f"T-{it['contract_id']}" for it in items]
+
+    dispatch_dir = get_dispatch_dir()
+    dispatch_dir.mkdir(parents=True, exist_ok=True)
+
+    month_part = month or "all"
+    payload_path = dispatch_dir / f"{unit_id}_{month_part}.json"
+    payload_path.write_text(
+        json.dumps(payload, ensure_ascii=False, indent=2),
+        encoding="utf-8",
+    )
+
+    log_id = f"L-{uuid.uuid4().hex[:8]}"
+    repo.insert_dispatch_log(
+        conn, log_id, unit_id, month or "all", task_ids, str(payload_path),
+        status="dry_run",
+    )
+    conn.commit()
+
+    logger.info(
+        "dispatcher: unit=%s month=%s items=%d payload=%s log=%s",
+        unit_id, month or "(all)", len(items), payload_path, log_id,
+    )
+    return {
+        "log_id": log_id,
+        "unit_id": unit_id,
+        "unit_name": payload["to"]["unit_name"],
+        "month": month or "(all)",
+        "item_count": len(items),
+        "payload_path": str(payload_path),
+        "status": "dry_run",
+    }