Misc offchain cleanup in codec, txm, logpoller, chainaccessor

[ogtownsend]

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[Copilot]

Pull request overview

This PR performs cleanup across multiple offchain components including codec, txm, logpoller, and chainaccessor. The primary focus is improving error handling by adding proper error checks to the ToRawAddr function and related address conversion operations.

Changes:

• Modified ToRawAddr function to return errors instead of panicking on invalid addresses
• Added graceful shutdown handling in txm's broadcast loop and channel closure
• Improved nil/zero-value checks across logpoller models and chainaccessor
• Enhanced address validation in commit codec operations

Reviewed changes

Copilot reviewed 18 out of 18 changed files in this pull request and generated 2 comments.

Show a summary per file

File	Description
pkg/txm/txm.go	Added graceful shutdown handling and channel closure
pkg/logpoller/store/postgres/queryparser.go	Added error handling for address conversion
pkg/logpoller/store/postgres/models_test.go	Updated test to check FromFilter error
pkg/logpoller/store/postgres/models.go	Made FromFilter and FromLog return errors
pkg/logpoller/store/postgres/logs.go	Improved batch size handling logic
pkg/logpoller/store/postgres/filters.go	Added error handling for address conversions
pkg/logpoller/models/models.go	Added nil checks for BlockRange and FilterKey
pkg/logpoller/loader/loader.go	Added missing channel close
pkg/ccip/ocr/contract_transmitter.go	Added error handling for wallet address conversion
pkg/ccip/codec/msghasher_test.go	Updated test to handle ToRawAddr error
pkg/ccip/codec/executecodec_test.go	Updated test to handle ToRawAddr error
pkg/ccip/codec/commitcodec_test.go	Refactored to use randomUnknownAddress helper
pkg/ccip/codec/commitcodec.go	Added address validation for merkle roots
pkg/ccip/codec/addresscodec_test.go	Updated test to handle ToRawAddr error
pkg/ccip/codec/addresscodec.go	Changed ToRawAddr to return error for invalid inputs
pkg/ccip/chainaccessor/ton_accessor.go	Added error handling and nil checks throughout
pkg/ccip/chainaccessor/event.go	Made convertCCIPMessageSent return error
pkg/ccip/chainaccessor/config.go	Updated addrToBytes to handle conversion errors

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