apollo_committer_config: validate config

[nimrod-starkware]

Note

Low Risk
Limited to configuration validation and import/type tweaks; main risk is rejecting previously-accepted invalid config combinations at startup.

Overview
Adds explicit Validate support for the concrete committer config (CommitterConfig<CachedStorageConfig<RocksDbStorageConfig>>) instead of deriving it generically.

Validation now (1) delegates to the nested storage_config.validate() and (2) enforces a cross-field constraint: when reader_config.build_storage_tries_concurrently is enabled, storage_config.inner_storage_config.spawn_blocking_reads must also be true (otherwise validation fails with a ValidationErrors entry).

^{Written by Cursor Bugbot for commit 8a11f44. This will update automatically on new commits. Configure here.}

[reviewable-StarkWare]

This change is 

[nimrod-starkware]

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This pull request is not mergeable via GitHub because a downstack PR is open. Once all requirements are satisfied, merge this PR as a stack on Graphite.
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• starknet_patricia_storage: rename cached storage #12734
• apollo_committer_config: validate config #12728 👈 (View in Graphite)
• starknet_committer_and_os_cli: build storage tries concurrently based on py config #12444
• starknet_patricia_storage: always cache writes in cached storage #12443
• starknet_committer: flush siblings into storage #12272
• starknet_committer: collect storage tries siblings #12271
• starknet_committer: collect siblings when traversing the tree #12270
• starknet_patricia_storage: extend the storage trait to optionally flush to cache #12269
• starknet_committer: create storage tries based on config #12441 : 1 other dependent PR (#12267 )
• starknet_committer: add a field indicating if storage tries should be created concurrently #12440
• starknet_committer: remove code dup for single trie #12201
• starknet_patricia_storage: remove code dup for mget #12175
• starknet_patricia_storage: spawn a task or not based on config #12174
• starknet_patricia_storage: add config field to rocksDB storage #12173
• starknet_patricia_storage: add config field to rocksDB #12172
• starknet_patricia_storage: spawn blocking tasks for rocksDB reads #12168 : 1 other dependent PR (#12169 )
• starknet_committer: parallel reads using unordered futures #12167
• starknet_committer: create sotrage tries sequentially #12166
• starknet_patricia,starknet_committer: dont pass storage mut when not needed #12165
• starknet_patricia_storage: non mut get in storage trait #12123 : 1 other dependent PR (#12252 )
• starknet_patricia_storage: dont cache reads in cached storage #12251
• starknet_patricia_storage: atomic counters for read stats #12122
• main-v0.14.2

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