feat: wire in published DEF CON 34 firmware build

[thebentern]

Summary

• The DEF CON 34 build has shipped to meshtastic.github.io/event/defcon34/firmware-2.8.0.b00d76f, so populate the edition's firmware block (version/id/title/zipUrl/releaseNotes), which was null ("coming soon").
• Corrects the firmware slug from the provisional defcon2026 to the published defcon34 — the flasher derives event/{slug}/firmware-{version} from it, so it must match the real path.
• Release notes now lead with a preview-build warning.

Test plan

• Validated data/eventFirmware.json as well-formed JSON
• Confirmed event/defcon34/firmware-2.8.0.b00d76f exists in meshtastic.github.io via the GitHub API

Summary by CodeRabbit

• New Features
  • Added downloadable DEF CON 34 firmware details, including version, title, identifier, and ZIP archive.
  • Added release notes indicating the firmware is a preview build.

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Organization UI

Review profile: CHILL

Plan: Pro Plus

Run ID: e05dcd44-673e-45bc-97ca-951bbec512cb

📥 Commits

Reviewing files that changed from the base of the PR and between 6b19961 and 97d22ab.

📒 Files selected for processing (1)

• data/eventFirmware.json

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📝 Walkthrough

Walkthrough

The DEF CON 34 firmware entry in data/eventFirmware.json is populated with a slug, version, identifier, title, ZIP URL, and preview-build release notes.

Changes

DEF CON 34 firmware release

Layer / File(s)	Summary
Populate firmware release metadata data/eventFirmware.json	The DEF CON 34 firmware block replaces placeholder values with concrete release metadata and preview-build notes.

Estimated code review effort: 1 (Trivial) | ~2 minutes

Possibly related PRs

• meshtastic/api#102: Populates metadata for a different event in the same firmware JSON file.

Suggested reviewers: jamesarich

Poem

A rabbit found a firmware file,
With DEF CON notes compiled in style.
A slug, a zip, a version bright,
Now hops toward release night.
\ /
(o.o)

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title clearly matches the main change: wiring in the published DEF CON 34 firmware build.
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.

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