fix: guard disabled immersion retention windows

backlog/tasks/task-244 - Assess-and-address-PR-36-latest-CodeRabbit-review-round-2.md

@@ -0,0 +1,28 @@
+---
+id: TASK-244
+title: 'Assess and address PR #36 latest CodeRabbit review round 2'
+status: In Progress
+assignee: []
+created_date: '2026-03-29 08:09'
+labels:
+  - code-review
+  - pr-36
+dependencies: []
+references:
+  - 'https://github.com/ksyasuda/SubMiner/pull/36'
+priority: high
+ordinal: 3610
+---
+
+## Description
+
+<!-- SECTION:DESCRIPTION:BEGIN -->
+Inspect the newest CodeRabbit review round on PR #36, verify the actionable comment against the current branch, implement the confirmed fix, and verify the touched path.
+<!-- SECTION:DESCRIPTION:END -->
+
+## Acceptance Criteria
+<!-- AC:BEGIN -->
+- [ ] #1 The actionable review comment is implemented or explicitly deferred with rationale.
+- [ ] #2 Touched path is verified with the smallest sufficient test lane.
+- [ ] #3 Current PR feedback is reduced to resolved or intentionally deferred suggestions.
+<!-- AC:END -->