Add AQ Telemetry to userPrefs

[oscgonfer]

Small PR to add AQ telemetry to userPrefs.

Summary by CodeRabbit

• New Features
  • Added configurable air-quality telemetry update intervals.
  • Added a preference to enable or disable air-quality measurements.
  • Included new template entries for configuring these air-quality settings.

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Path: .coderabbit.yaml

Review profile: CHILL

Plan: Pro Plus

Run ID: d8b283b8-01ac-4f37-9445-0d08f8946d20

📥 Commits

Reviewing files that changed from the base of the PR and between 4308487 and e8a7a50.

📒 Files selected for processing (2)

• src/mesh/NodeDB.cpp
• userPrefs.jsonc

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📝 Walkthrough

Walkthrough

Air-quality telemetry configuration now uses optional user preference macros for its update interval and enabled state, with new commented-out entries added to the user preference template.

Changes

Air-quality telemetry configuration

Layer / File(s)	Summary
Preference-driven telemetry initialization userPrefs.jsonc, src/mesh/NodeDB.cpp	Adds commented-out preferences for air-quality telemetry and initializes the telemetry interval and enabled state from those macros, defaulting the interval to 0 when unset.

Estimated code review effort: 1 (Trivial) | ~3 minutes

Suggested reviewers: thebentern

🚥 Pre-merge checks | ✅ 4 | ❌ 1

❌ Failed checks (1 warning)

Check name	Status	Explanation	Resolution
Description check	⚠️ Warning	The description is far too brief and omits the required template sections, including attestations and testing/regression details.	Replace the boilerplate with the required template content and add testing attestations, regression device checks, and any relevant issue references.

✅ Passed checks (4 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title is concise and accurately summarizes the main change: adding AQ telemetry to userPrefs.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests

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