v0.21.0

What's Changed

• ci(pypi): install protoc for macOS wheel builds by @thankrandomness in #82
• feat(jammi-ai): default-on local feature → thin remote-only wire build (no candle) by @thankrandomness in #83
• feat(remote): wire add_source on the typed RPC RemoteSession surface by @thankrandomness in #84
• release: v0.17.0 by @thankrandomness in #85
• feat(surface): M2 Stage 1 — ListSources/DescribeSource/GetServerInfo engine introspection by @thankrandomness in #86
• release: v0.18.0 by @thankrandomness in #87
• feat(packaging): M2 Stages 2+3 — pure-Python jammi-client + unified connect(target), local-only embed wheel by @thankrandomness in #88
• release: v0.19.0 — packaging & client-API redesign (M2 Stages 2+3) by @thankrandomness in #89
• build(server): M2 Stage 5 — jammi-ai-server-cu12 CUDA image by @thankrandomness in #90
• fix(m2): retro-audit remediations by @thankrandomness in #91
• fix(client): get_server_info matches the 3-field proto (revert phantom services) by @thankrandomness in #92
• feat(server): S8 — configurable service tiers + ServerInfo.services handshake by @thankrandomness in #93
• feat(query): S7 — unify search + general remote compound query via Flight SQL inference UDF by @thankrandomness in #94
• release: v0.20.0 — service tiers (S8) + compound query (S7) by @thankrandomness in #95
• M3 open-core (OSS side): authenticated channels, SigningKeyStore port, dep-direction guards — v0.21.0 by @thankrandomness in #97

Full Changelog: v0.16.0...v0.21.0