AgentMBX v0.5.2

What's Changed

• feat(T205): send-time recipient truth by @kryptobaseddev in #51
• T204: chosen identities only (unbound start, resume, per-project list, register) by @kryptobaseddev in #52
• feat(T207): sender receipts with mbx_sent and per-recipient thread lines by @kryptobaseddev in #53
• T209: identity prune and owner-signed forward; docs for chosen identities by @kryptobaseddev in #54
• fix(T206): process-evidence load resilience by @kryptobaseddev in #55
• feat(T208): project ledger, owner-signed project lead and mbx_forward by @kryptobaseddev in #56
• T210: release the identity when an mbx server is ended by SIGTERM/SIGHUP by @kryptobaseddev in #57
• feat(T211): doctor surfaces stranded mail, pending identities and prune weight by @kryptobaseddev in #58
• release(T210): v0.5.2 by @kryptobaseddev in #59
• Release v0.5.2: chosen identities, delivery truth and project oversight (T203, P0) by @kryptobaseddev in #60

Full Changelog: v0.5.1...v0.5.2