Add gauntlet race and pantheon day-one fields for placement badges

[owens1127]

Summary

• Add isGauntletRace on instance responses and prefer gauntlet race leaderboard rank when an entry exists
• Compute pantheon isDayOne from version release date (release_date_override) instead of activity day_one_end
• Expose gauntletRaceEntry and pantheonVersionFirstEntries on player profile for pantheon profile cards

Test plan

• Verify /instance/{id} for a gauntlet race clear returns isGauntletRace: true and gauntlet rank
• Verify pantheon clears within 24h of version release return isDayOne: true
• Verify player profile includes pantheonVersionFirstEntries for pantheon version-first placements
• CI passes

Made with Cursor

[barecheck]

Barecheck - Code coverage report

Total: 90.94%

Your code coverage diff: 0.02% ▴

Uncovered files and lines

File	Lines
src/routes/player/membershipId/profile.ts	86, 97
src/services/instance/instance.ts	195, 224-230, 232-233, 238, 242
src/services/player-instances/instances.ts	52
src/services/player.ts	214-222