chore(guides): update 2 guides (#328)

Author: fxck

apps/docs/content/guides/choose-queue.mdx

@@ -18,7 +18,9 @@ description: "**Use NATS** for most cases (simple, fast, JetStream persistence).
 
 - Ports: 4222 (client), 8222 (HTTP monitoring)
 - Auth: user `zerops` + auto-generated password
-- Connection: `nats://${user}:${password}@${hostname}:4222`
+- **Connection** — two supported patterns, pick ONE:
+  - **Separate env vars** (recommended, works with every NATS client library): pass `servers: ${hostname}:${port}` plus `user: ${user}, pass: ${password}` as client-side connect options. The servers list stays credential-free.
+  - **Opaque connection string**: pass `${connectionString}` directly as the servers option — the platform builds a correctly-formatted URL with embedded auth that the NATS server expects.
 - JetStream: Enabled by default (`JET_STREAM_ENABLED=1`)
 - Storage: Up to 40GB memory + 250GB file store
 - Max message: 8MB default, 64MB max (`MAX_PAYLOAD`)
@@ -40,3 +42,4 @@ description: "**Use NATS** for most cases (simple, fast, JetStream persistence).
 2. **Kafka single-node has no replication**: 1 broker = 3 partitions but zero redundancy
 3. **NATS JetStream HA sync interval**: 1-minute sync across nodes — brief data lag possible
 4. **Kafka SASL only**: No anonymous connections — always use the generated credentials
+5. **NATS authorization violation from a hand-composed URL**: do not build a `nats://user:pass@host:4222` URL from the separate env vars. Most NATS client libraries will parse the embedded credentials AND separately attempt SASL with the same values, producing a double-auth that the server rejects with `Authorization Violation` on the first CONNECT frame (symptom: startup crash, no successful subscription). Use either the separate env vars passed as connect options (credential-free servers list) or the opaque `${connectionString}` the platform builds for you — both patterns in the Connection section above avoid the double-auth path.

apps/docs/content/guides/object-storage-integration.mdx

@@ -11,7 +11,8 @@ When you create an Object Storage service, Zerops auto-generates these env vars
 
 | Variable | Description |
 |----------|-------------|
-| `apiUrl` | S3 endpoint URL (accessible from Zerops and remotely) |
+| `apiUrl` | S3 endpoint URL — full `https://...` URL ready for any S3 SDK's `endpoint` option |
+| `apiHost` | S3 endpoint host only (no scheme); use only if the client library needs host separately |
 | `accessKeyId` | S3 access key |
 | `secretAccessKey` | S3 secret key |
 | `bucketName` | Auto-generated bucket name (hostname + random prefix, immutable) |
@@ -20,6 +21,8 @@ When you create an Object Storage service, Zerops auto-generates these env vars
 | `serviceId` | Service ID (Zerops-generated) |
 | `hostname` | Service hostname |
 
+**Use `${storage_apiUrl}` as the S3 endpoint** — it carries the complete `https://` scheme and is what every S3 SDK's `endpoint` option expects. The `apiHost` variant is host-only; if a client library requires host separately, combine `https://${storage_apiHost}` manually — **never `http://`**. The object-storage gateway rejects plaintext HTTP with a 301 redirect to the HTTPS equivalent, and most S3 SDKs don't follow the redirect automatically. The symptom of a misconfigured endpoint is `UnknownError` or connection-refused on the first bucket call.
+
 Reference them in zerops.yml `run.envVariables`:
 ```yaml
 S3_ENDPOINT: ${storage_apiUrl}