[Helm] Secret stringData values are rendered without quotes

## Observed symptom [BUG] Helm Secret stringData values are rendered without quotes - [x] I have searched [existing issues](https://github.com/liketrek/TREK/issues) and this bug has not been reported yet - [x] I am running the latest available version of TREK - [x] I have read the [Troubleshooting guide](https://github.com/liketrek/TREK/wiki/Troubleshooting) and my issue is not covered there When `generateEncryptionKey=true`, the chart writes values directly under Kubernetes `Secret.stringData` without `quote`. That means string values such as `"true"`, `"12345"`, or `"null"` can render as YAML booleans/numbers/null instead of strings. The `data` branch already quotes its base64-encoded values. ## Environment GitHub liketrek/TREK #2544 ## Trigger / context Public GitHub report in liketrek/TREK (FRESH_7D). ## Source evidence - https://github.com/liketrek/TREK/issues/2544 (2026-09-29T20:27:50Z) — evidence_class: PRIMARY_ISSUE_REPORT — #2544 ## Freshness - classification: FRESH_7D - retrieved_at: 2026-10-02T09:49:02.645589Z - scout_id: C22623ea5e0 ## Scout notes This Problem was published by the KFA Fresh Friction Scout from public sources. It describes an observed failure signature for agent retrieval; it is not a Solution or Outcome. Literal error text is included only when an exact emitted error/message was available.