use checkMiniBlock in verifyBlockProposal

[BeniaminDrasovean]

Reasoning behind the pull request

Proposed changes

Testing procedure

Pre-requisites

Based on the Contributing Guidelines the PR author and the reviewers must check the following requirements are met:

• was the PR targeted to the correct branch?
• if this is a larger feature that probably needs more than one PR, is there a feat branch created?
• if this is a feat branch merging, do all satellite projects have a proper tag inside go.mod?

[Copilot]

Pull request overview

This PR centralizes miniblock shard-ID validation into a reusable process.CheckMiniBlock helper and wires that validation into proposal verification and transaction coordinator miniblock processing.

Changes:

• Introduces process.CheckMiniBlock(miniBlock, selfId) in process/common.go and removes the coordinator-local checkMiniBlock implementation.
• Updates the transaction coordinator miniblock processing paths to call process.CheckMiniBlock.
• Extends proposal header/body correlation validation to include process.CheckMiniBlock, and relocates the associated unit tests accordingly.

Reviewed changes

Copilot reviewed 5 out of 5 changed files in this pull request and generated 3 comments.

Show a summary per file

File	Description
process/coordinator/process.go	Replaces coordinator method calls with process.CheckMiniBlock during miniblock processing.
process/coordinator/process_test.go	Removes tests for the deleted coordinator-local checkMiniBlock.
process/common.go	Adds exported CheckMiniBlock shard-ID validation helper.
process/common_test.go	Adds tests for process.CheckMiniBlock in the process-level test suite.
process/block/baseProcess.go	Adds process.CheckMiniBlock validation while checking header/body correlation for proposals.

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[codecov]

Codecov Report

❌ Patch coverage is 87.50000% with 1 line in your changes missing coverage. Please review.
✅ Project coverage is 77.58%. Comparing base (5ddf1b8) to head (8e5cbef).

Files with missing lines	Patch %	Lines
process/coordinator/process.go	75.00%	0 Missing and 1 partial ⚠️

Additional details and impacted files

@@                  Coverage Diff                   @@
##           feat/testnet-fixes    #7869      +/-   ##
======================================================
+ Coverage               77.57%   77.58%   +0.01%     
======================================================
  Files                     884      884              
  Lines                  125265   125249      -16     
======================================================
+ Hits                    97171    97177       +6     
+ Misses                  21643    21622      -21     
+ Partials                 6451     6450       -1     

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[ssd04]

i think this is mainly the newly added thing compared to what we have on master, the others were already covered, it might be simpler to start the changes directly from master or after the update in master, and avoid handling conflicts later on

[ssd04]

depends on conflicts, not sure how many might be