feat(firebasedataconnect): update the API

#### firebasedataconnect:v1beta

The following keys were added:
- schemas.PostgreSql.properties.ephemeral.description
- schemas.PostgreSql.properties.ephemeral.readOnly
- schemas.PostgreSql.properties.ephemeral.type
- schemas.PostgreSql.properties.unlinked.deprecated

#### firebasedataconnect:v1

The following keys were added:
- schemas.PostgreSql.properties.ephemeral.description
- schemas.PostgreSql.properties.ephemeral.readOnly
- schemas.PostgreSql.properties.ephemeral.type
- schemas.PostgreSql.properties.unlinked.deprecated

Author: yoshi-automation

discovery/firebasedataconnect-v1.json

@@ -1076,7 +1076,7 @@
       }
     }
   },
-  "revision": "20250706",
+  "revision": "20250803",
   "rootUrl": "https://firebasedataconnect.googleapis.com/",
   "schemas": {
     "CancelOperationRequest": {
@@ -1679,6 +1679,11 @@
           "description": "Required. Name of the PostgreSQL database.",
           "type": "string"
         },
+        "ephemeral": {
+          "description": "Output only. Ephemeral is true if this data connect service is served from in-memory emulation of Postgres. Data Connect service will transfer the data on a best-effort basis to the Cloud SQL instance once it's provisioned and linked. WARNING: When `ephemeral=true`, mutations to the database are not guaranteed to be durably persisted, even if an OK status code is returned. All or parts of the data may be lost or reverted to earlier versions.",
+          "readOnly": true,
+          "type": "boolean"
+        },
         "schemaMigration": {
           "description": "Optional. Configure how to perform Postgresql schema migration.",
           "enum": [
@@ -1708,6 +1713,7 @@
           "type": "string"
         },
         "unlinked": {
+          "deprecated": true,
           "description": "No Postgres data source is linked. If set, don't allow `database` and `schema_validation` to be configured.",
           "type": "boolean"
         }

discovery/firebasedataconnect-v1beta.json

@@ -1076,7 +1076,7 @@
       }
     }
   },
-  "revision": "20250706",
+  "revision": "20250803",
   "rootUrl": "https://firebasedataconnect.googleapis.com/",
   "schemas": {
     "CancelOperationRequest": {
@@ -1679,6 +1679,11 @@
           "description": "Required. Name of the PostgreSQL database.",
           "type": "string"
         },
+        "ephemeral": {
+          "description": "Output only. Ephemeral is true if this data connect service is served from in-memory emulation of Postgres. Data Connect service will transfer the data on a best-effort basis to the Cloud SQL instance once it's provisioned and linked. WARNING: When `ephemeral=true`, mutations to the database are not guaranteed to be durably persisted, even if an OK status code is returned. All or parts of the data may be lost or reverted to earlier versions.",
+          "readOnly": true,
+          "type": "boolean"
+        },
         "schemaMigration": {
           "description": "Optional. Configure how to perform Postgresql schema migration.",
           "enum": [
@@ -1708,6 +1713,7 @@
           "type": "string"
         },
         "unlinked": {
+          "deprecated": true,
           "description": "No Postgres data source is linked. If set, don't allow `database` and `schema_validation` to be configured.",
           "type": "boolean"
         }

src/apis/firebasedataconnect/v1.ts

@@ -534,6 +534,10 @@ export namespace firebasedataconnect_v1 {
      * Required. Name of the PostgreSQL database.
      */
     database?: string | null;
+    /**
+     * Output only. Ephemeral is true if this data connect service is served from in-memory emulation of Postgres. Data Connect service will transfer the data on a best-effort basis to the Cloud SQL instance once it's provisioned and linked. WARNING: When `ephemeral=true`, mutations to the database are not guaranteed to be durably persisted, even if an OK status code is returned. All or parts of the data may be lost or reverted to earlier versions.
+     */
+    ephemeral?: boolean | null;
     /**
      * Optional. Configure how to perform Postgresql schema migration.
      */

src/apis/firebasedataconnect/v1beta.ts

@@ -534,6 +534,10 @@ export namespace firebasedataconnect_v1beta {
      * Required. Name of the PostgreSQL database.
      */
     database?: string | null;
+    /**
+     * Output only. Ephemeral is true if this data connect service is served from in-memory emulation of Postgres. Data Connect service will transfer the data on a best-effort basis to the Cloud SQL instance once it's provisioned and linked. WARNING: When `ephemeral=true`, mutations to the database are not guaranteed to be durably persisted, even if an OK status code is returned. All or parts of the data may be lost or reverted to earlier versions.
+     */
+    ephemeral?: boolean | null;
     /**
      * Optional. Configure how to perform Postgresql schema migration.
      */