CKB storage safety alpha v0.7.0-alpha.2

Roadmap stage: evidence-backed-cv-drafting
Channel: alpha
Source commit: e8bfdf6

Validation: https://github.com/akoita/draft-loop/actions/runs/32787238107
Stage issue: #113
SBOM: CycloneDX JSON is attached to the release.
Checkpoint status: this release integrates the CKB foundation but does not validate or complete the v0.7 drafting outcome.
Provenance: not requested for this run.

Known limitations: profile, opportunity, retrieval, planning, complete-CV, writing-policy, storage-safety, signing, and automatic-update work remains incomplete; CLI remains source-distributed.

What's Changed

• docs(release): record v0.7.0-alpha.1 evidence by @akoita in #171
• feat(storage): coordinate CKB writers with recoverable leases by @akoita in #173
• feat(storage): recover interrupted CKB writes safely by @akoita in #174
• feat(storage): define explicit CKB retention policy by @akoita in #175
• feat(storage): export portable CKB backup packages by @akoita in #176
• feat(storage): restore portable CKB backups by @akoita in #177
• docs: make CKB operations easier to scan by @akoita in #178
• chore(release): prepare v0.7.0-alpha.2 by @akoita in #186

Full Changelog: v0.7.0-alpha.1...v0.7.0-alpha.2