Foundry Versioning Policy

[AmadiMichael]

Foundry Versioning Policy

Introduces a formal Foundry versioning policy requiring a 3-month minimum delay period and a formal proposal process with security team review via design documents before any upgrades. Adds packages/contracts-bedrock/book/src/policies/foundry-upgrades.md defining the complete update process, review criteria, and implementation requirements for synchronized updates across mise.toml, op-deployer/pkg/deployer/forge/version.json, and superchain-ops.

Corresponding Template PR: ethereum-optimism/design-docs#362

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 77.56%. Comparing base (4de6002) to head (b9a9ca5).
⚠️ Report is 2071 commits behind head on develop.

Additional details and impacted files

@@             Coverage Diff             @@
##           develop   #18804      +/-   ##
===========================================
+ Coverage    73.54%   77.56%   +4.01%     
===========================================
  Files          190      135      -55     
  Lines        11318     7288    -4030     
===========================================
- Hits          8324     5653    -2671     
+ Misses        2848     1635    -1213     
+ Partials       146        0     -146     

Flag	Coverage Δ
cannon-go-tests-64	?
contracts-bedrock-tests	77.56% <ø> (+0.53%)	⬆️

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