chore(release): prepare api-to-typemcp 0.2.6

[sjungwon03]

Summary

Prepare immutable api-to-typemcp@0.2.6 to release the verified generated TypeMCP runtime-alignment fix from #107/#108.

• SKILL metadata: 0.2.6
• README GitHub Release link: v0.2.6
• release-contract and mocked immutable-publication fixtures: 0.2.6/v0.2.6
• TypeMCP runtime contract remains @theorvane/type-mcp@0.3.2

Safety

• Existing v0.2.5 tag/release and public 0.2.5 registries are untouched.
• No release workflow, registry mutation, template, dependency, or agent-installation gate change.
• Actual publication remains owned solely by verified protected main push workflow.

Verification

• RED: release contract produced expected metadata-version mismatch failures before canonical update.
• GREEN: release contract 19; runtime docs 2; docs harness 8; workspace 3; generated security/render/static/E2E 30; Python compile; git diff --check.
• Rendered consumer npm ci --ignore-scripts: exact runtime 0.3.2 npm URL/SRI; production audit 0 vulnerabilities.
• Independent read-only review: no blocking findings.

Closes #109

[sjungwon03-ai]

Reviewed exact head 1ac0732 against current dev 9d7457f. Release identity is consistently 0.2.6/v0.2.6 across SKILL metadata, README, and contract fixtures. Required CI succeeded at the exact head; unresolved threads: 0. TypeMCP runtime stays 0.3.2, and existing immutable 0.2.5 artifacts/workflow behavior remain untouched. Approving governed dev merge.