fix issue when use-latest-blocks not used for solana profile

[erwin-wee]

Description

• Added logic to handle start-block and end-block passed in from command line args, and to use first available block as start block and latest block as end block if not specified in command line args.

Issues Resolved

• Running Solana profile would encounter an error if --use-latest-blocks is not used, due to start and end block not being set properly.

Summary by CodeRabbit

• New Features
  • Added support for explicitly specifying block ranges in Solana test data generation.
  • Block ranges now automatically fall back to computed values when not explicitly provided.
  • Improved safeguards ensure block ranges remain within available bounds.

[coderabbitai]

Walkthrough

Added explicit handling of start_block and end_block parameters in Solana test data generation. When provided, these values override computed defaults; otherwise, the earliest available and latest block numbers are used. Existing safeguards and behavior with use_latest_blocks flag are preserved.

Changes

Cohort / File(s)	Summary
Solana test data block range configuration chainbench/test_data/solana.py	Added conditional logic to accept explicit start_block and end_block parameters from parsed options, falling back to computed block numbers when not provided

Estimated code review effort

🎯 2 (Simple) | ⏱️ ~10 minutes

• Single file modification with additive conditional logic
• Block range parameter handling follows a consistent if-else pattern
• Safeguards and existing behavior are preserved unchanged

Poem

🐰 A rabbit hops through blocks so fine,
Start and end now yours to define!
No more defaults set in stone,
Your test ranges, fully your own!
Solana's chains, now under your reign. ✨

Pre-merge checks and finishing touches

✅ Passed checks (2 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title directly addresses the main bug fix: handling the Solana profile when --use-latest-blocks flag is not used, which aligns with the file changes and PR objectives.
Description check	✅ Passed	The pull request description follows the required template with both Description and Issues Resolved sections clearly filled out.

✨ Finishing touches

• 📝 Generate docstrings

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Post copyable unit tests in a comment
• Commit unit tests in branch fix/solana-test-data-error

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