fix: Update LoRa presets for JP region by removing illegal options and adding NARROW

[t-miura]

Summary

This PR will remove two presets for JP region due to regulatory reason, while adding two new ones for better performance in japanese RF noisy environments.

This is not directly related to #11559, but that PR is a byproduct of this.

Details and Changes

This PR includes following changes to src/mesh/RadioInterface.cpp targeted only for JP region:

1. Removes two following exisitng presets when region is set to JP as they may exceeds maximum transmission time(4 seconds) defined by law and ARIB STD-T108 standard due to its slower data rate.

   • LONG_SLOW / LongSlow (already deprecated, but still exists in firmware)
   • LONG_MODERATE / LongMod

2. Adds two presets that are currently only for EU/ham, for an alternative solution to overcome our noisy RF environment without exceeding the limit:

   • NARROW_FAST
   • NARROW_SLOW
   • sidenote: initially I planned to add LITE_* as well, but that results too many presets, so i picked narrwer two.

3. As these combination of presets are now unique to this region, new RegionProfile has to be made as PROFILE_JP

4. Also, to use this new RegionProfile, RDEF line for JP region will updated as well.

Open Questions

• While removing two unsafe preset is unique to JP region, adding LITE/NARROW can be adopted more widely, so I wonder there might be a better way to adding these rather than making this change only for JP region.
• Also, for experimental run, we can manually set values to match with NARROW/LITE preset, so adding is not an urgent thing, while I'd like to get these added as a ready-to-pick presets.

🤝 Attestations

• I have tested that my proposed changes behave as described.
• I have tested that my proposed changes do not cause any obvious regressions on the following devices:
  • Heltec (Lora32) V3
  • LilyGo T-Deck
  • LilyGo T-Beam
  • RAK WisBlock 4631
  • Seeed Studio T-1000E tracker card
  • Other (please specify below)
    • Seeed Studio Wio-E5
    • Heltec Mesh Node T114

Summary by CodeRabbit

New Features

• Added a dedicated modem configuration for Japan with region-specific presets.
• Japan now supports long-, medium-, short-, narrow-, and turbo-range modem options.
• Lite presets are excluded from the Japan configuration where unavailable.
• Devices operating in Japan now automatically use the appropriate regional modem settings for improved compatibility and configuration accuracy.

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📝 Walkthrough

Walkthrough

The Japan region now uses PROFILE_JP with Japan-specific modem presets instead of PROFILE_STD.

Changes

Japan radio profile

Layer / File(s)	Summary
Define and assign Japan radio profile src/mesh/RadioInterface.cpp	Adds Japan-specific long, medium, short, narrow, and turbo presets without lite presets. Creates PROFILE_JP and assigns it to the JP region.

Estimated code review effort: 1 (Trivial) | ~5 minutes

Merge Risk: ⚪ Minimal · up to 13dd5

This localized preset update has no actionable merge-blocking risk at the current head and is merge-ready after normal checks and review.

Suggested reviewers: nomdetom

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check. Docstring coverage is scoped to functions touched by this diff. Analyzed 0 functions across 1 files.
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.
Title check	✅ Passed	The title clearly describes the main change: updating Japan-region LoRa presets by removing restricted options and adding narrow presets.
Description check	✅ Passed	The description explains the regulatory rationale, lists the preset changes, identifies the affected file, documents open questions, and includes completed testing attestations.

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[t-miura]

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Inline comments:
In `@src/mesh/RadioInterface.cpp`:
- Around line 49-53: Increase the generated preset capacity used by
getRegionPresetMap() to at least 12 so PRESETS_JP includes MEDIUM_TURBO. Update
the protobuf source defining this capacity, then regenerate the affected
generated files without changing the preset ordering.

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