[Fix] Emit genesis shnarf and initializer to latest version

[thedarkjester]

This PR implements issue(s) #

Checklist

• I wrote new tests for my new core changes.
• I have successfully ran tests, style checker and build against my new changes locally.
• I have informed the team of any breaking changes if there are any.

---

Note

High Risk
Touches upgrade/initializer gating and reentrancy protections in core messaging/bridging/rollup contracts; incorrect versioning or slot handling could break proxy upgrades or weaken safety guarantees.

Overview
Adds a shared InitializationVersionCheck mixin and updates TokenBridge, L2MessageService, and LineaRollup initializers to require an exact pre-initialized version (0) and to use newer reinitializer versions (TokenBridge/L2MessageService: 3, LineaRollup: 8), changing “double-initialize” failures to the new InitializedVersionWrong custom error.

Reworks upgrade reinitializers (reinitializeV3/reinitializeV8) to drop proxy-admin slot checks and instead clear legacy OpenZeppelin reentrancy guard storage with explicit slot writes, reverting with ReentrantCall if the legacy guard indicates an entered state; TransientStorageReentrancyGuardUpgradeable is also updated to use a fixed transient storage key via tload/tstore.

Updates rollup initialization to emit LineaRollupBaseInitialized with an added genesisShnarf argument, and extends test-only contracts to allow raw sload/sstore for simulating upgrade states; Hardhat tests are updated/expanded to assert initialized versions, upgrade behavior, and new revert expectations.

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[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 60.92%. Comparing base (317ee4a) to head (7f1bd60).
⚠️ Report is 19 commits behind head on main.

Additional details and impacted files

@@             Coverage Diff              @@
##               main    #2337      +/-   ##
============================================
- Coverage     60.93%   60.92%   -0.01%     
  Complexity     1619     1619              
============================================
  Files           436      437       +1     
  Lines         17363    17359       -4     
  Branches       1908     1906       -2     
============================================
- Hits          10580    10576       -4     
  Misses         6123     6123              
  Partials        660      660              

Flag	Coverage Δ		*Carryforward flag
hardhat	97.89% <100.00%> (-0.01%)	⬇️
kotlin	56.64% <ø> (ø)		Carriedforward from 67e4d9c

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

Files with missing lines	Coverage Δ
contracts/src/bridging/token/TokenBridge.sol	100.00% <100.00%> (ø)
contracts/src/bridging/token/TokenBridgeBase.sol	100.00% <ø> (ø)
...ontracts/src/common/InitializationVersionCheck.sol	100.00% <100.00%> (ø)
contracts/src/messaging/l2/L2MessageService.sol	100.00% <100.00%> (ø)
...ontracts/src/messaging/l2/L2MessageServiceBase.sol	100.00% <ø> (ø)
contracts/src/rollup/LineaRollup.sol	100.00% <100.00%> (ø)
contracts/src/rollup/LineaRollupBase.sol	100.00% <100.00%> (ø)
...ncy/TransientStorageReentrancyGuardUpgradeable.sol	100.00% <100.00%> (ø)

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[cursor]

Cursor Bugbot has reviewed your changes and found 1 potential issue.