[Architecture & Database] Dynamic Signer Balance Rebalancing

[0xVida]

Description:
Automatically shift fee-bump transaction signing duties to the account with the highest balance in the signer pool.

Requirements and Context:

CRITICAL CONTEXT: All code changes and execution steps for this issue must happen strictly within the fluid-server folder of the repository. Ensure you are working inside the fluid-server/ directory before beginning.

The Fluid platform requires professional-grade architecture & database standards. This issue focuses on dynamic signer balance rebalancing to ensure the system is production-ready and resilient.

Acceptance Criteria:

• Implement dynamic signer balance rebalancing logic in the fluid-server package
• Ensure full test coverage (unit and integration)
• Verify compliance with internal design and security standards
• Validate Dynamic Signer Balance Rebalancing handles edge cases correctly

Deliverables:

• Code implementation in fluid-server/src
• Updated documentation in /docs
• Verification report with terminal output/screenshots

NOTE: This issue will NOT be reviewed or approved without functional screenshots or verified terminal output where applicable!

Suggested Execution:

1. Research existing implementation in fluid-server
2. Draft a technical design for Dynamic Signer Balance Rebalancing
3. Execute implementation and verify against local environment
4. Run full test suite to ensure no regressions

Guidelines:

• Maintain consistency with the existing TypeScript/Rust coding standards.
• Prioritize performance and memory efficiency.

Example Commit Message:

feat: dynamic-signer-balance-rebalancing