Replace weighted approximation for loser raw stake in TruthBountyWeighted with exact tracking

[dDevAhmed]

• Impact: Logic fails for 6-decimal tokens (USDC).
• Fix: Use token.decimals().
• Complexity: Medium

[muhahahmad68]

@muhahahmad68 has applied to work on this issue as part of the Stellar Wave Program's 4th wave.

Kindly assign this issue to me, I'd like to resolve it

ℹ️ Repo Maintainers: To accept this application, review their application or assign @muhahahmad68 to this issue.

[Tenny150]

@Tenny150 has applied to work on this issue as part of the Stellar Wave Program's 5th wave.

i would like to work on these

ℹ️ Repo Maintainers: To accept this application, review their application or assign @Tenny150 to this issue.

[Godbrand0]

@Godbrand0 has applied to work on this issue as part of the Stellar Wave Program's 5th wave.

hello, i can help out with this issue

ℹ️ Repo Maintainers: To accept this application, review their application or assign @Godbrand0 to this issue.