feat: add get_job_logs tool with tail

spark_executor/tools/logs.py

@@ -0,0 +1,23 @@
+# coding=utf-8
+"""
+@Time   :2026/6/24
+@Author :tao.chen
+"""
+from common.logging import logger
+from spark_executor.core.job_store import JobStore
+from spark_executor.core.yarn_client import get_application_logs
+
+store = JobStore()
+
+
+def get_job_logs(job_id: str, tail_chars: int = 5000) -> str:
+    job = store.get(job_id)
+    if job is None:
+        raise KeyError(f"Unknown job_id: {job_id}")
+    full = get_application_logs(job.application_id)
+    tailed = full[-tail_chars:] if len(full) > tail_chars else full
+    logger.info(
+        f"get_job_logs job_id={job_id} application_id={job.application_id} "
+        f"chars={len(tailed)}"
+    )
+    return tailed