feat: stellar bridge improvements (blacklist, batching, dry-run, thro…

[coderDom-x]

…ughput)"Closes #346
Closes #347
Closes #348
Closes #349

Summary

This PR adds core improvements to the Stellar bridge system focusing on safety, performance, observability, and execution efficiency.

Changes

Route Blacklist System (#347)

• Blocks unsafe or unreliable bridge routes
• Supports dynamic blacklist updates
• Improves routing safety

Throughput Analyzer (#349)

• Measures transfer throughput across providers
• Enables performance comparison
• Helps identify bottlenecks

Dry-Run Transfer API (#348)

• Simulates transfers before execution
• Returns estimated outcomes
• Improves user safety and confidence

Transaction Batching (#346)

• Groups compatible operations into batches
• Reduces execution overhead
• Improves throughput efficiency

Testing

• Unit tests added for all modules
• Verified blacklist filtering logic
• Validated batching and dry-run behavior
• Throughput metrics tested

Impact

• Safer routing decisions
• Faster transaction execution
• Better system observability
• Improved user trust in execution results"

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