fix(k8s): resolve internal job compose files from data/compose-jobs

resolve_job_compose_file() used Path(stack).parent.parent for the
internal fallback, which resolved to data/stacks/compose-jobs/ instead
of data/compose-jobs/. This meant deploy create couldn't find job
compose files for internal stacks, so they were never copied to the
deployment directory and never created as k8s Jobs.

Use the same data directory resolution pattern as resolve_compose_file.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

stack_orchestrator/util.py

@@ -155,9 +155,8 @@ def resolve_job_compose_file(stack, job_name: str):
         if proposed_file.exists():
             return proposed_file
         # If we don't find it fall through to the internal case
-    # TODO: Add internal compose-jobs directory support if needed
-    # For now, jobs are expected to be in external stacks only
-    compose_jobs_base = Path(stack).parent.parent.joinpath("compose-jobs")
+    data_dir = Path(__file__).absolute().parent.joinpath("data")
+    compose_jobs_base = data_dir.joinpath("compose-jobs")
     return compose_jobs_base.joinpath(f"docker-compose-{job_name}.yml")