feat(rust): add derivation pipeline test framework

[ajsutton]

Summary

• Add rust/derivation-tests crate — a framework for AI agents to construct deterministic L1+L2 chains and test the OP Stack derivation pipeline
• Provides L1/L2 chain builders, batch encoding (singular batches, zlib/brotli compression, channel framing), in-memory EVM state with trie root computation, and JSON-RPC + beacon API servers
• Targets testing across op-program, kona-proofs, op-node, and kona-node using the same synthetic chain data

Modules

Module	Purpose
config	Deterministic rollup configuration with all hardforks active from genesis
state	In-memory EVM state DB (revm CacheDB) with Merkle trie root computation and EIP-1186 proofs
l1 / l2	Chain builders for constructing valid block sequences with proper parent hashing
batch	Channel encoding: singular batches → compress → frame → calldata
server	jsonrpsee L1/L2 RPC servers + axum beacon blob API on random ports
harness	High-level DerivationTest entry point, runner stubs for op-program/kona
roots	Output root (V0) and super root (V1) computation via kona-protocol

Test plan

• 10 unit tests pass (config determinism, state roots, batch encoding roundtrip, channel framing)
• 5 integration tests pass (empty blocks, batch submission, multi-block L2, L1 chain structure)
• 1 ignored test stub for op-program invocation (requires external binary)
• cargo clippy -p derivation-tests -- -D warnings clean
• cargo test -p derivation-tests — 16 pass, 0 fail

🤖 Generated with Claude Code

[wiz-inc-a178a98b5d]

Wiz Scan Summary

Scanner	Findings
Vulnerabilities	4  1  2
Sensitive Data	-
Secrets	-
IaC Misconfigurations	-
SAST Findings	-
Software Management Findings	-
Total	4  1  2

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 57.1%. Comparing base (7f9662a) to head (3862018).

❗ There is a different number of reports uploaded between BASE (7f9662a) and HEAD (3862018). Click for more details.

HEAD has 10 uploads less than BASE

Flag	BASE (7f9662a)	HEAD (3862018)
unit	2	0
cannon-go-tests-64	1	0
contracts-bedrock-tests	8	1

Additional details and impacted files

@@             Coverage Diff             @@
##           develop   #19471      +/-   ##
===========================================
- Coverage     75.3%    57.1%   -18.3%     
===========================================
  Files          671      139     -532     
  Lines        71270     7255   -64015     
===========================================
- Hits         53722     4148   -49574     
+ Misses       17404     3107   -14297     
+ Partials       144        0     -144     

Flag	Coverage Δ
cannon-go-tests-64	?
contracts-bedrock-tests	57.1% <ø> (-18.9%)	⬇️
unit	?

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