Release BIMRI v5.1.0: restore persistent memory lifecycle

[EvolutionUnleashed]

Summary

• replace hard tier counts with soft targets and atomic Tier 2 cold-current cooling
• restore direct owner-confirmed Tier 1 and confirmed-memory updates, plus exact stable-key generations
• add quiet durable held intents and read-only hot/cold/history recall while keeping conflicts to genuine incompatible same-key concurrency
• activate v5.1 authority losslessly from public v5.0.3/v5.0.2 stores, preserving bimri.md and immutable evidence byte-for-byte

No runtime feature flag, temporary containment, or product-specific integration is included.

Validation

• 195 local tests passed: 36 lifecycle/adversarial, 153 legacy, and 6 release-contract tests (10 expected platform skips)
• Python 3.8 grammar, compile, JSON-template, and diff checks passed
• populated v5.0.3-store upgrade tests preserve bimri.md, the derived index, and all pre-existing immutable/unknown evidence bytes; the prior engine fails closed after activation
• deterministic week 1/2/3/4 and month-5 models record every valid intent with zero loss under normal, burst, and initially-full workloads
• hostile adversarial review signed off with no unresolved defect