Improve match state handling, side swapping, and backup restoration

[AHDR3]

🔄 Improve match state handling, side swapping, and backup restoration

This PR introduces a set of critical fixes and a new feature to enhance eBot's match flow stability and configurability.

🔗 Related Pull Request: eBot-Web#117

This PR must be merged together with the linked PR in eBot-CSGO-Web, as both contain dependent logic changes (e.g. backend + frontend support for halftime readiness).
⚠️ Please merge eBot-CSGO-Web#117 before merging this PR to avoid inconsistent state.

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✅ New Feature

• "Ready on Halftime" option
  Integrates the new match option allowing admins to change halftime ready behave. Feature requested here [Feature] Readying up for 2nd Halftime and OT to be optional #192

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🛠 Fixes

• Fix incorrect side swapping after backup restore
  Ensures teams are placed correctly after restoring from a backup, especially during halftime or overtime.

• Fix OT backup score issues
  Corrects bugs where overtime scores were inaccurately saved or restored. Issued opened here Backup/restore mismatch in OT #186

• Fix "Stop to Warmup" behavior
  Correctly transitions the match from live to warmup mode when stopping.

• Fix knife config not resetting after forced knife end
  Prevents leftover knife settings after admins skip or force-end knife rounds (like disabling giving bomb).

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💡 Notes

These updates:

• Improve match control during critical transitions.
• Fix multiple edge cases with backups, OT, and rollbacks.
• Provide admins with a more predictable and stable match management experience.