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, 20 insertions, 0 deletions

diff --git a/packages/host-bin/src/config.test.ts b/packages/host-bin/src/config.test.ts
index a5cfde1..fc74a79 100644
--- a/packages/host-bin/src/config.test.ts
+++ b/packages/host-bin/src/config.test.ts
@@ -51,6 +51,26 @@ describe("envToConfigMap", () => {
 		expect(result["provider.openai-compat.baseURL"]).toBeUndefined();
 		expect(result["provider.openai-compat.model"]).toBeUndefined();
 	});
+
+	it("maps SURFACE_WS_PORT to surfaceWsPort", () => {
+		const result = envToConfigMap({ SURFACE_WS_PORT: "24206" });
+		expect(result.surfaceWsPort).toBe(24206);
+	});
+
+	it("ignores a non-numeric SURFACE_WS_PORT", () => {
+		const result = envToConfigMap({ SURFACE_WS_PORT: "abc" });
+		expect(result.surfaceWsPort).toBeUndefined();
+	});
+
+	it("ignores a non-positive SURFACE_WS_PORT", () => {
+		const result = envToConfigMap({ SURFACE_WS_PORT: "0" });
+		expect(result.surfaceWsPort).toBeUndefined();
+	});
+
+	it("omits surfaceWsPort when SURFACE_WS_PORT is unset", () => {
+		const result = envToConfigMap({});
+		expect(result.surfaceWsPort).toBeUndefined();
+	});
 });
 
 describe("configMapToAccess", () => {