fix: random test failures

Deleting the job manager when the cli finishes explicitly avoids random issues in the tests when the cli is called repeatedly.

src/gridtk/cli.py

@@ -60,6 +60,13 @@ def cli(ctx, database, logs_dir):
     ctx.meta["job_manager"] = JobManager(database=database, logs_dir=logs_dir)
 
 
+@cli.result_callback()
+def process_result(result, **kwargs):
+    """Delete the job manager from the context."""
+    ctx = click.get_current_context()
+    del ctx.meta["job_manager"]
+
+
 @cli.command(
     epilog="""\b
 Example:

src/gridtk/manager.py

@@ -135,6 +135,7 @@ def update_jobs(self) -> None:
         for grid_id, job in jobs_by_grid_id.items():
             if grid_id in job_statuses:
                 job.update(job_statuses[grid_id])
+        self.session.flush()
 
     def list_jobs(
         self,
@@ -200,3 +201,4 @@ def __del__(self):
                 Path(self.database).unlink()
             if self.logs_dir.exists() and len(os.listdir(self.logs_dir)) == 0:
                 shutil.rmtree(self.logs_dir)
+        self.engine.dispose()