feat(lsp,cwd): LSP integration + per-conversation cwd; fix cache-warming cache bust

LSP + per-conversation CWD feature:
- new bundled `lsp` extension: hand-rolled JSON-RPC codec (framing/rpc), lazy
  one-server-per-(serverID,root), per-cwd config resolution, on-demand `lsp` tool
- `conversation-store`: getCwd/setCwd (cwdKey); `session-orchestrator` defaults a
  turn's cwd from the store
- `transport-http`: cwd + lsp status endpoints; wire types in transport-contract
- host-bin: register lsp; config wiring

Cache-warming fix (the warm read 0% on the first reheat after a message):
- warm assembled tools under a different cwd than the real turn (a reheat sends no
  cwd, and the warm service had no store fallback). The skills filter rewrites the
  cwd-sensitive `load_skill` description, so the tools block — the first bytes of
  the prompt-cache prefix — diverged and the cache missed entirely. Warm now
  resolves cwd as opts.cwd ?? conversationStore.getCwd(), mirroring handleMessage.
- capture warm sends as `provider.request` spans flagged `warm:true` (thread a
  child logger into providerOpts) so warm vs real bodies are diffable (obs §3.1).
- kernel logger: span-close now merges child-bound attrs like span-open, so a
  `warm:true` query finds the closed span (with usage/status), not just the open.

Tests: warm forwards a warm-flagged logger; warm falls back to stored cwd; logger
open/close attr consistency. Full suite green (873).

1 files changed, 1 insertions, 0 deletions

diff --git a/packages/host-bin/package.json b/packages/host-bin/package.json
index 0d2b817..27a4a1b 100644
--- a/packages/host-bin/package.json
+++ b/packages/host-bin/package.json
@@ -20,6 +20,7 @@
 		"@dispatch/tool-edit-file": "workspace:*",
 		"@dispatch/tool-write-file": "workspace:*",
 		"@dispatch/journal-sink": "workspace:*",
+		"@dispatch/lsp": "workspace:*",
 		"@dispatch/surface-loaded-extensions": "workspace:*",
 		"@dispatch/surface-registry": "workspace:*",
 		"@dispatch/transport-ws": "workspace:*"