### ⚡ Add retry logic for temporary RPC failures

[El-swaggerito]

Overview
RPC requests may fail temporarily due to network issues. The SDK should retry safe requests.

Requirements

• Add retry utility with configurable attempts
• Use retries for read-only calls and safe network requests
• Avoid retrying signed write transactions unless explicitly safe

Acceptance Criteria

• Temporary failures are retried
• Retry count is configurable
• Failed retries return structured error

Labels: performance, reliability

[roobie001]

@roobie001 has applied to work on this issue as part of the Stellar Wave Program's 4th wave.

Hello I would love to work on this as soon as possible

ℹ️ Repo Maintainers: To accept this application, review their application or assign @roobie001 to this issue.