⚡ Bolt: Add early loop termination in group creation

[google-labs-jules]

💡 What:
Introduced an early loop termination condition (break) inside grabNextAvailablePlayer located in packages/shared/src/parallelGroupCreator.ts. When evaluating players, if an absolute optimal penalty score is found (bestScore === 0), the loop skips checking the rest of the available candidates. I also exported SeasonPairs in packages/shared/src/index.ts to address an existing typecheck error in the frontend.

🎯 Why:
This prevents unnecessary scanning over large candidate arrays when the best possible mathematical match has already been identified, effectively reducing CPU cycle wastage during heavy Mythic+ group generation operations.

📊 Impact:
Saves O(N) operations whenever a perfect 0 score teammate is found early in the available players list, which particularly improves performance when dealing with large guilds and massive user pools.

🔬 Measurement:
The optimization can be measured under stress conditions where large lists of players exist with heavy overlapping historical groups, reducing the time complexity inside the grabNextAvailablePlayer iterations. Running benchmark scripts over multiple cycles demonstrates improved median times.

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PR created automatically by Jules for task 17567293915650584198 started by @TytaniumDev

[google-labs-jules]

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