fix(agent): preserve video input capability

[octo-patch]

Reason: MiniMax M3 advertises video input, but the model option contract drops that capability.

Summary

• parse advertised video-input metadata from verbose catalog entries
• preserve video-input support across canonical model options, runtime snapshots, daemon and CLI projections, and the TypeScript activity adapter
• expose the optional capability in the OpenAPI contract and regenerate clients

Verification

• go test ./packages/agent/daemon/modelcatalog -run '^TestRuntimeConfigOptionModelRoundTripPreservesCapabilities$' -count=1
• go test ./packages/agent/daemon/runtime -run '^TestApplyACPModelsResultPreservesDynamicModelMetadata$' -count=1
• go test ./services/tuttid/api -run '^TestGeneratedComposerConfigOptionKeepsVideoInputCapability$' -count=1
• pnpm --filter @tutti-os/agent-activity-tuttid-adapter test
• pnpm --filter @tutti-os/agent-activity-core typecheck
• pnpm --filter @tutti-os/agent-activity-tuttid-adapter typecheck
• pnpm check:api-generated
• pnpm check:agent-host-boundary
• focused TypeScript, YAML, Go formatting, and diff checks

Impact

This is platform-neutral capability metadata and does not change path, process, filesystem, or operating-system behavior. The OpenAPI schema is the durable contract documentation for the new optional field.