Reconcile v0.11.0 external closure

[xeonvs]

Summary

• record independently verified stable v0.11.0 delivery receipts in the archived plan, roadmap, and release index
• advance .release-reconciled-version from 0.10.1 to the unchanged stable 0.11.0 marker
• keep this no-release closure limited to lifecycle documentation and the reconciliation marker

Verification

• 83 focused release/documentation tests passed
• git diff --check passed
• stable workflow 35446513596, immutable five-asset Release, annotated tag target, TestPyPI/PyPI artifact identity, receipt tuple, 15 workflow-owned issue receipts, milestone closure, branch cleanup, and synchronized main were independently read back

No OCR or Codex Security rerun: this no-release reconciliation changes only lifecycle prose and the reconciliation marker, after the previously reviewed immutable release was published.