[Shackole]

Summary

Emits a match/limit_reached event carrying (player, current_count) when a player reaches the MAX_ACTIVE_MATCHES_PER_PLAYER cap or when create_match / add_active_match rejects a match with Error::TooManyActiveMatches, allowing monitoring tools to alert operators when the active match limit is reached.

Related Issue

Closes #1818

What Changed

• Contracts: Updated create_match_internal and add_active_match in contracts/escrow/src/lib.rs to emit ("match", "limit_reached") with (player, count) when the active match limit is reached and before returning Error::TooManyActiveMatches.
• Tests: Added test_too_many_active_matches_emits_limit_reached_event in contracts/escrow/src/tests/events.rs asserting the match/limit_reached event is emitted.
• Docs: Documented the match/limit_reached monitoring event in docs/security.md.

Checklist

• cargo test passes locally
• cargo clippy is clean
• Tests added or updated for this change
• Documentation updated (or no update needed)