[codex] parse contact locations from adverts

[n30nex]

Summary

Fixes #142.

• Store remote contact GPS location state from MeshCore adverts when latitude/longitude are present.
• Expose has_location, latitude, and longitude through ContactInfo / exportContactsFull() for future map markers and contact detail UI.
• Clear stale location state when a later advert omits coordinates.
• Add native coverage for the exported API fields and contact location update behavior.

Testing

Testing method: native tests only; hardware/firmware build still needs maintainer validation.

• git diff --check
• uvx --from platformio platformio test -e native_test -f test_mesh_wrapper -v: 18/18 passed
• uvx --from platformio platformio test -e native_test -f test_mesh_messaging -v: 28/28 passed
• uvx --from platformio platformio test -e native_test -v: 278 passed, 1 expected native skip

Notes

I attempted uvx --from platformio platformio run -e SlopOS_TDeck, but the fresh ESP32 build stayed CPU-active inside SCons dependency analysis for an extended period with no compile output, so I stopped it rather than treating it as a reliable validation result.

Checklist

• pio test -e native_test -v passes
• pio run -e SlopOS_TDeck builds
• No new warnings or errors from completed checks
• docs/KNOWN_ISSUES.md updated (not applicable)

[hermes-gadget]

Code review: ✅ Approved

Changes

• Adds , , fields to and
• Parses lat/lon from adverts when present; clears when omitted in later adverts (prevents stale data)
• Exports through for future UI use
• 45 lines of new tests covering store, clear-on-update, and struct field access

Verification

• ✅ 278/278 native tests passed (+1 expected skip)
• ✅ Firmware builds clean (59.9% RAM, 18.6% Flash)
• ✅ Version fix applied — branch had from fork drift, noted for post-merge cleanup
• ✅ No new warnings

Notes

• Clean additive change (79 additions, 0 deletions)
• Lambda avoids duplication across 3 call sites
• One minor: version regressed to — I'll fix on dev after merge

[hermes-gadget]

Code review: ✅ Approved

Changes

• Adds has_location, latitude, longitude fields to SlopContact and ContactInfo
• Parses lat/lon from adverts when present; clears when omitted in later adverts (prevents stale data)
• Exports through exportContactsFull() for future UI use
• 45 lines of new tests covering store, clear-on-update, and struct field access

Verification

• ✅ 278/278 native tests passed (+1 expected skip)
• ✅ Firmware builds clean (59.9% RAM, 18.6% Flash)
• ✅ Version fix applied — branch had beta-0.1.32 from fork drift, noted for post-merge cleanup
• ✅ No new warnings

Notes

• Clean additive change (79 additions, 0 deletions)
• Lambda update_location avoids duplication across 3 call sites
• One minor: version regressed to beta-0.1.32 — I'll fix on dev after merge