Stubbed Referral Logic in place_bet

[hman38705]

Description
Line 19 accepts a referrer, but the logic for allocating rewards or fees to that referrer is entirely missing from the function body. The protocol is claiming to support a referral system that is mechanically non-functional, misleading promoters and users about the economic incentives of the platform.

Requirements and context

• Fully implement the referral reward allocation during the bet placement process.
• Transfer a portion of the fee to the ReferrerBalance map (from Issue 1/9).

Suggested execution

• Fork the repo and create a branch: git checkout -b feat/issue-88-referral-implementation
• Wire up the economic rewards.

Implementation changes

• Update bets.rs to calculate and store referral rewards upon successful bet placement.

Test and commit

• Verify that a referrer's balance increases correctly after a successful referred bet.

Example commit message
feat: fully implement referral reward allocation in place_bet

Guidelines

• Economic functional integrity.
• Timeframe: 72 hours.

[MethelyDev]

@MethelyDev has applied to work on this issue as part of the Stellar Wave Program's 3rd wave.

I would like to work on this issue, kindly assign me

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