feat(models): add Claude Opus 5.5 to model catalog

[rynfar]

Adopts upstream change pingdotgg/t3code#13094 to introduce Claude Opus 5.5 to the model catalog.

• Adds claude-opus-5-5 to apps/server/src/provider/model-manifest.json under claudeAgent.
• Configures options for reasoning effort (defaulting to medium, with ultracode and ultrathink support), fast mode, and 200k/1M context windows.
• Requires Claude Code CLI minimum version 2.1.280.
• Preserves existing opus alias on Opus 5.

Verification

• Verified 193 focused unit tests across ModelManifest.test.ts, ClaudeModelCatalog.test.ts, ClaudeAdapter.test.ts, and modelManifestPublication.test.ts.
• Verified node apps/server/scripts/prepare-model-manifests.ts.
• vp run -F t3 typecheck passed (0 errors).
• vp fmt --check and git diff --check passed.

Implemented with gemini-3.8-flash-high in Antigravity.

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Project	Deployment	Actions	Updated
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Thread transfer impact

✅ Thread transfer remains within every enforced ceiling.

Provider	Metric	Main baseline	This PR	Impact	PR ceiling
Codex	Total thread wire	13.9 KiB	13.9 KiB	+15 B (+0.1%)	15.1 KiB	✅
Codex	Thread snapshot wire	7.2 KiB	7.2 KiB	−3 B (−0.0%)	7.3 KiB	✅
Codex	Live turn WebSocket wire	6.7 KiB	6.7 KiB	+18 B (+0.3%)	7.8 KiB	✅
Codex	Live turn WebSocket decoded	58.0 KiB	58.0 KiB	0 B (0.0%)	66.4 KiB	✅
Codex	Live turn messages	8	8	0 (0.0%)	21	✅
Claude	Total thread wire	14.0 KiB	13.9 KiB	−17 B (−0.1%)	15.1 KiB	✅
Claude	Thread snapshot wire	7.2 KiB	7.2 KiB	−15 B (−0.2%)	7.3 KiB	✅
Claude	Live turn WebSocket wire	6.7 KiB	6.7 KiB	−2 B (−0.0%)	7.8 KiB	✅
Claude	Live turn WebSocket decoded	58.9 KiB	58.9 KiB	0 B (0.0%)	66.4 KiB	✅
Claude	Live turn messages	9	9	0 (0.0%)	21	✅

Baseline: 84f540c · PR result: 891e4fb · Source CI: success

Scenario and decoded snapshot size

10 historical turns, 5 command tools per turn, 878.9 KiB retained MCP result per historical turn, and a 1.05 MiB retained result in the measured turn.

• Codex decoded thread snapshot: 115.6 KiB
• Claude decoded thread snapshot: 116.3 KiB

Updated in place by a trusted workflow. PR artifacts are strictly validated and never executed.