Ten-loop engineering upgrade and release hardening

[OnourImpram]

Status

Draft engineering work in progress on the dedicated sol-ultra/mneme-ten-loop-upgrade branch.

This pull request is being used to execute and verify the ten-loop engineering protocol without modifying main directly. The final description will be replaced with the complete executive summary, architecture changes, user-visible changes, security and privacy changes, tests, benchmarks, compatibility and migration notes, rollback plan, known limitations, and reviewer checklist.

Starting commit: 36a2da1dbb713da25852ee6cb77f2b5e0a5798a9.

Do not merge while this PR remains a draft.

[OnourImpram]

Superseded by #36.

Unique diff inventory against #36 finalization head:

• 14 chunk or patch transport payloads under .github/ten-loop/ are intentionally not retained.
• 6 temporary apply, baseline, snapshot, and tree-sitter workflows are intentionally not retained.
• Release: complete Mneme 3.6.0 ten-loop engineering hardening #36 carries the verified implementation directly, keeps the normal ci.yml and release.yml paths, and removes temporary release machinery.

No unique validated 3.6.0 product diff remains in this PR. Closing as superseded without merge.