feat: add in-memory JobStore

spark_executor/core/job_store.py

@@ -0,0 +1,28 @@
+# coding=utf-8
+"""
+@Time   :2026/6/24
+@Author :tao.chen
+"""
+from threading import Lock
+
+from spark_executor.models import Job
+
+
+class JobStore:
+    """In-memory job registry. Stage-3 will swap this for SQLite."""
+
+    def __init__(self) -> None:
+        self._lock = Lock()
+        self._jobs: dict[str, Job] = {}
+
+    def put(self, job: Job) -> None:
+        with self._lock:
+            self._jobs[job.job_id] = job
+
+    def get(self, job_id: str) -> Job | None:
+        with self._lock:
+            return self._jobs.get(job_id)
+
+    def list(self) -> list[Job]:
+        with self._lock:
+            return list(self._jobs.values())