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, 12 insertions, 1 deletions

diff --git a/packages/transport-http/src/extension.ts b/packages/transport-http/src/extension.ts
index 5274033..6c988a5 100644
--- a/packages/transport-http/src/extension.ts
+++ b/packages/transport-http/src/extension.ts
@@ -4,6 +4,7 @@ import {
 	cacheWarmHandle,
 	conversationStoreHandle,
 	credentialStoreHandle,
+	lspServiceHandle,
 	sessionOrchestratorHandle,
 	throughputStoreHandle,
 } from "./seam.js";
@@ -14,13 +15,21 @@ export const manifest: Manifest = {
 	version: "0.0.0",
 	apiVersion: "^0.1.0",
 	trust: "bundled",
-	dependsOn: ["conversation-store", "credential-store", "session-orchestrator", "throughput-store"],
+	dependsOn: [
+		"conversation-store",
+		"credential-store",
+		"lsp",
+		"session-orchestrator",
+		"throughput-store",
+	],
 	capabilities: { network: true },
 	contributes: {
 		routes: [
 			"/chat",
 			"/chat/warm",
 			"/conversations/:id",
+			"/conversations/:id/cwd",
+			"/conversations/:id/lsp",
 			"/health",
 			"/models",
 			"/metrics/throughput",
@@ -45,6 +54,7 @@ export function createTransportHttpExtension(): Extension & {
 			const credentialStore = host.getService(credentialStoreHandle);
 			const throughputStore = host.getService(throughputStoreHandle);
 			const warmService = host.getService(cacheWarmHandle);
+			const lspService = host.getService(lspServiceHandle);
 			const logger = host.logger;
 
 			const app = createApp({
@@ -53,6 +63,7 @@ export function createTransportHttpExtension(): Extension & {
 				credentialStore,
 				throughputStore,
 				warmService,
+				lspService,
 				logger,
 			});