[DataAvailability] Implement fork-aware Execution Data Endpoints

[AndriiDiachuk]

closes: #7656

Context

• Refactored access and observer builders to initialize newly added members before creating snapshot mock.
• Updated backend endpoint (GetExecutionDataByBlockID).
• Added arguments to backend implementation to specify user query criteria.
• Updated test according to changes.

[peterargue]

added a few small comments. overall this looks good. will wait for the rest of your changes before doing a thorough review

[codecov-commenter]

Codecov Report

❌ Patch coverage is 17.75701% with 176 lines in your changes missing coverage. Please review.

Files with missing lines	Patch %	Lines
cmd/access/node_builder/access_node_builder.go	0.00%	70 Missing ⚠️
cmd/observer/node_builder/observer_builder.go	0.00%	50 Missing ⚠️
...ptimistic_sync/mock/block_execution_data_reader.go	0.00%	23 Missing ⚠️
engine/access/state_stream/mock/api.go	0.00%	17 Missing ⚠️
...executiondatasync/optimistic_sync/mock/snapshot.go	0.00%	11 Missing ⚠️
...cess/state_stream/backend/backend_executiondata.go	92.30%	2 Missing ⚠️
...utiondatasync/optimistic_sync/snapshot/snapshot.go	0.00%	2 Missing ⚠️
engine/access/state_stream/backend/handler.go	87.50%	1 Missing ⚠️

📢 Thoughts on this report? Let us know!

[peterargue]

mostly small comments. the main 2 were about error handling and bootstrapping. otherwise this looks good

[UlyanaAndrukhiv]

Looks good to me! I left a few minor comments.

[AndriiDiachuk]

@peterargue could you review it today please?

[peterargue]

looks good. please address the conflicts, then we can merge