Merge queued PRs into dev

[blukat29]

Proposed changes

• Update max commission rate of public delegation #18
• Add test for TreasuryRebalanceV2 #19
• Remove klaytn from ecrecover error #25
• docs: Fix word #22
• Fix service chain rpc #27
• Return zero tip cap if next baseFee is lower bound #28

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• Bugfix
• New feature or enhancement
• Others

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• I have read the CLA and signed by comment I have read the CLA Document and I hereby sign the CLA in first time contribute
• Lint and unit tests pass locally with my changes ($ make test)
• I have added tests that prove my fix is effective or that my feature works
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Related issues

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Further comments

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