feat: add Claude Opus 5 model

[wizzoapp]

What changed

• add Claude Opus 5 to the server catalog and backend, replacing the advertised Opus 4.8 entry
• expose Opus 5 effort and fast mode with its fixed 1M context window
• migrate shorthand Opus 4.8 inputs to Opus 5 while keeping exact persisted 4.8 sessions runnable and fallback attribution accurate
• make live, pending, and hydrated Claude catalogs enforce version gates and retired-model pruning without losing proven models during transient probe failures
• add focused provider, adapter, alias, registry, cache, and directive-default coverage

Why

Opus 5 needs to be selectable in the web and desktop clients and runnable by the backend today. The dispatched SHA c3e8fb67d was verified after refreshing upstream and changes only Macroscope review-agent frontmatter; the actual upstream product patch is 41a430a88 (upstream pingdotgg#4472). This hotfix applies the product patch plus the minimum fork-specific replacement and compatibility behavior required by the explicit decision that Opus 5 replaces Opus 4.8.

This fresh PR supersedes #242 from the exact same head because that PR exhausted its per-PR Codex review allowance after multiple completed review rounds.

Validation

• full workspace typecheck
• contracts package: 208 tests passed
• focused server/shared model tests: 153 tests passed
• focused cache and registry suites: 48 and 42 tests passed across review fixes
• production web build plus build-output assertion
• isolated controlled-browser picker proof: Claude Opus 5 visible and selectable; Claude Opus 4.8 absent
• every commit passed the factory static checks and Codex autoreview gate
• superseded PR head CI: 10/10 checks passed

The four-provider E2E matrix is intentionally skipped. Post-merge deployment still requires the controlled deploy, external probe, and a real Opus 5 turn.

[chatgpt-codex-connector]

💡 Codex Review

Here are some automated review suggestions for this pull request.

Reviewed commit: ab4262adfd

ℹ️ About Codex in GitHub

Codex has been enabled to automatically review pull requests in this repo. Reviews are triggered when you

• Open a pull request for review
• Mark a draft as ready
• Comment "@codex review".

If Codex has suggestions, it will comment; otherwise it will react with 👍.

When you sign up for Codex through ChatGPT, Codex can also answer questions or update the PR, like "@codex address that feedback".

[chatgpt-codex-connector]

💡 Codex Review

Here are some automated review suggestions for this pull request.

Reviewed commit: 4f8f6ce453

ℹ️ About Codex in GitHub

Codex has been enabled to automatically review pull requests in this repo. Reviews are triggered when you

• Open a pull request for review
• Mark a draft as ready
• Comment "@codex review".

If Codex has suggestions, it will comment; otherwise it will react with 👍.

When you sign up for Codex through ChatGPT, Codex can also answer questions or update the PR, like "@codex address that feedback".

[chatgpt-codex-connector]

💡 Codex Review

Here are some automated review suggestions for this pull request.

Reviewed commit: a3999057ba

ℹ️ About Codex in GitHub

Codex has been enabled to automatically review pull requests in this repo. Reviews are triggered when you

• Open a pull request for review
• Mark a draft as ready
• Comment "@codex review".

If Codex has suggestions, it will comment; otherwise it will react with 👍.

When you sign up for Codex through ChatGPT, Codex can also answer questions or update the PR, like "@codex address that feedback".

[wizzoapp]

[from Codex]: Superseded by a fresh PR from this exact branch and factory-gated head because this PR has consumed its per-PR Codex review allowance. No code is being dropped; the replacement will reference this PR.

[wizzoapp]

[from Codex]: Replacement PR: #244. It uses the same branch and exact factory-gated head d1324fb.