GHSA-5h2w-qmfp-ggp6

## Summary

The `chat.send` path let authorized write-scoped callers persist `/verbose` session overrides even though the same stored session mutation is admin-only through `sessions.patch`.

## Impact

A write-scoped gateway caller could persist verbose output for later runs and expose more reasoning or tool output than the operator intended.

## Affected Component

`src/auto-reply/reply/directive-handling.impl.ts, src/gateway/sessions-patch.ts`

## Fixed Versions

- Affected: `<= 2026.3.24` - Patched: `>= 2026.3.28` - Latest stable `2026.3.28` contains the fix.

## Fix

Fixed by commit `c603123528` (`fix(gateway): require admin for persisted verbose defaults`).