fix(sdk-dividend): Add claim_all_dividends batch optimization for gas efficiency

[Kevin737866]

Description

Use contract claim_all_dividends for batch claiming.

Acceptance Criteria

• claimAllDividends(user) calls contract claim_all_dividends
• Returns array of claimed amounts per distribution
• Handles partial claims (some already claimed, some expired)
• Gas comparison: batch vs individual documented
• Tests: full batch, partial batch, empty batch

Files to Modify

• sdk/src/dividendClient.ts

[pleasureiliya69-ops]

@pleasureiliya69-ops has applied to work on this issue as part of the Stellar Wave Program's 7th wave.

I would like to work on this issue

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[ademolacomfort]

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

Hi, I'd like to work on this issue

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