release: 0.1.4 — forward cp_jwt + bucket via params._meta

On login the gateway now captures user.id from /v1/auth/login, derives
the user's MinIO bucket (user-<id>-files), and persists both in
~/.a2a/credentials.json. UpstreamAgent.callTool injects
``params._meta = { cp_jwt, cp_url, bucket }`` on every tools/call so
upstream agents see the same caller context the platform orchestrator
provides. Unauthenticated clients omit _meta — back-compat preserved.

Requires a2a-pack with the matching _meta handler in
``a2a_pack/mcp/server.py`` (companion change in apps/a2a).

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

src/gateway.ts

@@ -39,14 +39,25 @@ export interface GatewayHandle {
 
 export async function buildGateway(opts: GatewayOptions = {}): Promise<GatewayHandle> {
   const cfg = opts.agents ?? (await loadConfig()).agents;
-  const token =
-    opts.token !== undefined
-      ? opts.token
-      : (await loadCredentials())?.token ?? null;
+  const creds = opts.token !== undefined ? null : await loadCredentials();
+  const token = opts.token !== undefined ? opts.token : creds?.token ?? null;
+  // Forward CP credentials + bucket as params._meta so upstream agents
+  // can act on behalf of the caller (mirrors the platform-orchestrator
+  // call shape). When the user isn't logged in, _meta is omitted and
+  // upstream sees the same unauthenticated context as before.
+  const cpJwt = creds?.token ?? null;
+  const cpUrl = creds?.apiUrl ?? null;
+  const bucket = creds?.bucket ?? null;
 
   const upstreams = new Map<string, UpstreamAgent>();
   for (const a of cfg) {
-    upstreams.set(a.name, new UpstreamAgent({ name: a.name, url: a.url, token }));
+    upstreams.set(
+      a.name,
+      new UpstreamAgent({
+        name: a.name, url: a.url, token,
+        cpJwt, cpUrl, bucket,
+      }),
+    );
   }
 
   const server =