Major ELO performance updates.

[samsmithnz]

fixes #24

This pull request introduces significant optimizations to the Elo rating update process for World Cup tournaments. The main improvements include batching updates to games and tournament teams, reducing redundant database calls, and optimizing how Elo ratings are calculated and stored. These changes enhance both performance and maintainability.

[coveralls]

Pull Request Test Coverage Report for Build 20493633591

Warning: This coverage report may be inaccurate.

This pull request's base commit is no longer the HEAD commit of its target branch. This means it includes changes from outside the original pull request, including, potentially, unrelated coverage changes.

• For more information on this, see Tracking coverage changes with pull request builds.
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• For a quick fix, rebase this PR at GitHub. Your next report should be accurate.

Details

• 72 of 106 (67.92%) changed or added relevant lines in 1 file are covered.
• 99 unchanged lines in 3 files lost coverage.
• Overall coverage decreased (-3.9%) to 58.781%

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Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
src/SamSmithNZ.Service/DataAccess/WorldCup/EloRatingDataAccess.cs	72	106	67.92%

Files with Coverage Reduction	New Missed Lines	%
src/SamSmithNZ.Service/DataAccess/WorldCup/TournamentTeamDataAccess.cs	6	53.85%
src/SamSmithNZ.Service/DataAccess/WorldCup/GameDataAccess.cs	17	68.52%
src/SamSmithNZ.Service/DataAccess/WorldCup/EloRatingDataAccess.cs	76	35.12%

Totals
Change from base Build 20488920135:	-3.9%
Covered Lines:	1731
Relevant Lines:	2807

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💛 - Coveralls