Implement auto-compounding for claimable funding fees

[abayomicornelius]

Problem

Users must manually claim funding fees. Small accruals stay unclaimed wasting storage.

Why it matters

Gas costs of claiming small amounts often exceed the fee value.

Suggested fix

Add auto-claim option that automatically adds funding credits to position collateral.

Acceptance criteria

• Add auto_compound flag to position
• Apply funding credits to collateral automatically
• Add opt-in/opt-out function
• Test compounding math

[skaichima]

@skaichima has applied to work on this issue as part of the Stellar Wave Program's 7th wave.

Hi, I’d be glad to take this on. I’ll add the "auto_compound" position flag with opt-in/opt-out controls and update funding settlement to automatically apply eligible credits to collateral when enabled. I’ll also add focused tests to verify the compounding calculations and ensure existing manual-claim behavior remains unchanged when auto-compounding is disabled. ETD is in 8 hours tops, please assign

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

[biqqest]

@biqqest has applied to work on this issue as part of the Stellar Wave Program's 7th wave.

I will love to work on this issue please. I deliver high impact solutions, ensuring seamless workflow and client satisfaction

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