docs: Add CUBEJS_DB_SNOWFLAKE_PRIVATE_KEY

Author: igorlukanin

docs/pages/product/apis-integrations/rest-api.mdx

@@ -129,6 +129,7 @@ accessible for everyone.
 | `meta`    | [`/v1/meta`][ref-ref-meta] | ✅ Yes |
 | `data`    | [`/v1/load`][ref-ref-load] | ✅ Yes |
 | `graphql` | `/graphql` | ✅ Yes |
+| `sql`     | [`/v1/sql`][ref-ref-sql] | ✅ Yes |
 | `jobs`    | [`/v1/pre-aggregations/jobs`][ref-ref-paj] | ❌ No |
 | No scope  | `/livez`, `/readyz` | ✅ Yes |
 

docs/pages/reference/configuration/environment-variables.mdx

@@ -740,6 +740,14 @@ indefinitely][snowflake-docs-connection-options].
 | --------------- | ---------------------- | --------------------- |
 | `true`, `false` | `true`                 | `true`                |
 
+## `CUBEJS_DB_SNOWFLAKE_PRIVATE_KEY`
+
+The content of the private RSA key (encrypted or not).
+
+| Possible Values                | Default in Development | Default in Production |
+| ------------------------------ | ---------------------- | --------------------- |
+| Content of the private RSA key | N/A                    | N/A                   |
+
 ## `CUBEJS_DB_SNOWFLAKE_PRIVATE_KEY_PASS`
 
 The password for the private RSA key. Only required for encrypted keys.