Clean up spam native token address logs

[ogtownsend]

• Dropping Native token address is zero or empty. Ignore for disabled chains otherwise check for router misconfiguration to debug since it shows up for invalid/not supported lane combinations
• See previous discussions here
• The core issue is there's a gap between what the plugin reads as supportedChains from CCIPHome and what chains are actually configured in the dest chain's offramp source chain configs. supportedChains seems to be a superset of the actually supported source chains according to the OffRamp's source chain configs
• This PR also cleans up some logs in the DefaultAccessor

[github-actions]

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[Copilot]

Pull request overview

This PR reduces log noise by downgrading several log levels from warn/info to debug, particularly for expected scenarios like unsupported chain combinations and skipped configuration requests. The main change addresses spam from native token address warnings that occur for invalid/unsupported lane combinations where the supportedChains from CCIPHome is a superset of actually configured source chains.

Key changes:

• Downgraded native token address warning to debug level in ccip.go
• Standardized logger initialization and cleaned up redundant context fields in default_accessor.go
• Added helper function to check for no bindings errors in observation.go

Reviewed changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated 1 comment.

File	Description
pkg/reader/ccip.go	Downgraded native token address log from warn to debug to reduce spam for unsupported lanes
pkg/chainaccessor/default_accessor.go	Standardized logger with chain context, removed redundant log fields, and downgraded skipped config warning to debug
commit/merkleroot/observation.go	Added helper function to check for no bindings errors including string matching

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[github-actions]

Metric	ogt/clean-up-spammy-logs	main
Coverage	69.7%	70.1%