[Coordinator] Remove redundant blob compressor interface in coordinator

[gauravahuja]

This PR implements issue(s) #2638

Checklist

• I wrote new tests for my new core changes.
• I have successfully ran tests, style checker and build against my new changes locally.
• If this change is deployed to any environment (including Devnet), E2E test coverage exists or is included in this
  PR.
• I have informed the team of any breaking changes if there are any.

---

Note

Medium Risk
Touches blob compression/conflation sizing by replacing the coordinator-local compressor API with the external linea.blob API; behavior should be equivalent but exception/size semantics now depend on the shared library implementation.

Overview
Blob compression integration is refactored to drop the coordinator-defined BlobCompressor/BlobCompressionException in favor of linea.blob.BlobCompressor and linea.blob.BlobCompressionException.

The existing Go-backed implementation is replaced with GoBackedBlobCompressorAdapter, which wraps linea.blob.GoBackedBlobCompressor while keeping coordinator metrics/logging; conflation and backtesting apps are updated to instantiate this adapter.

Tests are updated/renamed to target the adapter and the fake compressor now implements the shared interface (including version and compressedSize).

^{Reviewed by Cursor Bugbot for commit 9600efd. Bugbot is set up for automated code reviews on this repo. Configure here.}

[codecov-commenter]

Codecov Report

❌ Patch coverage is 82.60870% with 4 lines in your changes missing coverage. Please review.
✅ Project coverage is 66.54%. Comparing base (5e5bc85) to head (9600efd).

Files with missing lines	Patch %	Lines
...zkevm/ethereum/coordination/blob/BlobCompressor.kt	90.47%	2 Missing ⚠️
.../zkevm/coordinator/app/conflation/ConflationApp.kt	0.00%	1 Missing ⚠️
.../conflationbacktesting/ConflationBacktestingApp.kt	0.00%	1 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##               main    #2789      +/-   ##
============================================
- Coverage     66.56%   66.54%   -0.02%     
  Complexity     1631     1631              
============================================
  Files           625      625              
  Lines         23739    23729      -10     
  Branches       2970     2968       -2     
============================================
- Hits          15801    15791      -10     
- Misses         7240     7241       +1     
+ Partials        698      697       -1     

Flag	Coverage Δ		*Carryforward flag
hardhat	95.90% <ø> (ø)		Carriedforward from 5e5bc85
kotlin	54.39% <82.60%> (-0.03%)	⬇️
lido-governance-monitor	97.60% <ø> (ø)		Carriedforward from 5e5bc85
linea-native-libs	90.69% <ø> (ø)		Carriedforward from 5e5bc85
linea-shared-utils	97.22% <ø> (ø)		Carriedforward from 5e5bc85
native-yield-automation-service	97.68% <ø> (ø)		Carriedforward from 5e5bc85
postman	100.00% <ø> (ø)		Carriedforward from 5e5bc85
sdk-core	98.01% <ø> (ø)		Carriedforward from 5e5bc85
sdk-ethers	89.83% <ø> (ø)		Carriedforward from 5e5bc85
sdk-viem	99.45% <ø> (ø)		Carriedforward from 5e5bc85

*This pull request uses carry forward flags. Click here to find out more.

Files with missing lines	Coverage Δ
...conflation/ConflationCalculatorByDataCompressed.kt	95.74% <ø> (ø)
.../zkevm/coordinator/app/conflation/ConflationApp.kt	0.00% <0.00%> (ø)
.../conflationbacktesting/ConflationBacktestingApp.kt	9.78% <0.00%> (ø)
...zkevm/ethereum/coordination/blob/BlobCompressor.kt	92.77% <90.47%> (-0.78%)	⬇️

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