feat(server): 新增费用规则运行时服务和系统赫尔墨斯服务，增强报销规则执行和系统监控能力

server/src/app/services/system_hermes.py

@@ -0,0 +1,77 @@
+from __future__ import annotations
+
+import os
+import shutil
+import subprocess
+from dataclasses import dataclass
+from pathlib import Path
+
+
+@dataclass(frozen=True, slots=True)
+class HermesCliResult:
+    response_text: str
+    session_id: str = ""
+    command: tuple[str, ...] = ()
+
+
+class SystemHermesService:
+    def __init__(self) -> None:
+        configured_bin = str(os.getenv("HERMES_BIN", "")).strip()
+        self.hermes_bin = configured_bin or shutil.which("hermes") or "/usr/local/bin/hermes"
+
+    def is_available(self) -> bool:
+        return Path(self.hermes_bin).exists()
+
+    def run_query(
+        self,
+        query: str,
+        *,
+        source: str = "tool",
+        max_turns: int = 1,
+        timeout_seconds: int = 180,
+    ) -> HermesCliResult:
+        if not self.is_available():
+            raise RuntimeError(f"未找到系统 Hermes CLI：{self.hermes_bin}")
+
+        command = (
+            self.hermes_bin,
+            "chat",
+            "-Q",
+            "--source",
+            source,
+            "--max-turns",
+            str(max_turns),
+            "-q",
+            query,
+        )
+        completed = subprocess.run(
+            command,
+            capture_output=True,
+            text=True,
+            timeout=timeout_seconds,
+            check=False,
+        )
+        if completed.returncode != 0:
+            detail = (completed.stderr or completed.stdout or "").strip()
+            raise RuntimeError(detail or "Hermes CLI 返回非 0 状态码。")
+
+        return self._parse_output(completed.stdout, command=command)
+
+    @staticmethod
+    def _parse_output(stdout: str, *, command: tuple[str, ...]) -> HermesCliResult:
+        lines = [line.rstrip() for line in str(stdout or "").splitlines()]
+        session_id = ""
+        response_lines: list[str] = []
+
+        for line in lines:
+            if line.startswith("session_id:"):
+                session_id = line.split(":", 1)[1].strip()
+                continue
+            response_lines.append(line)
+
+        response_text = "\n".join(line for line in response_lines if line.strip()).strip()
+        return HermesCliResult(
+            response_text=response_text,
+            session_id=session_id,
+            command=command,
+        )