⬆️ Upgrade khoj to 1.42.10

[github-actions]

Khoj is on 1.36.4; upstream released 1.42.10 on 2025-07-15 (minor bump).

Changes to apply

• hub/khoj/stack.yaml
  • version: "1.36.4" → version: "1.42.10"
• hub/khoj/stack.yaml
  • updated_at: 2025-02-07 → updated_at: 2025-07-15
• hub/khoj/compose.yaml
  • ${KHOJ_VERSION:-1.36.4} → ${KHOJ_VERSION:-1.42.10}

Container tag 1.42.10 was verified to exist upstream.

Required before merging

A newer release is not evidence that the new version still works with our
compose file, our .env and our volumes. Establish a baseline first, then
prove the bump did not regress it:

# 1. baseline: does it pass today, before any change?
./packages/scripts/maintenance/test-stack.sh khoj

# 2. apply the edits above, then:
./packages/scripts/maintenance/test-stack.sh khoj

The test pulls every image, waits for all services to become healthy, checks
that nothing crash-loops during a settle window, and makes a real HTTP request
to the app's entry point.

• If the baseline fails too, this app was already broken: fix that first or say
  so in the PR — it is not a regression from this bump.
• If the baseline passes and the bump fails, do not merge. Read the release
  notes: a required new env var or a migration usually needs .env or
  compose.yaml changes alongside the version.
• Attach the test output to the PR.

_{Filed automatically from work/version-drift.json.}