fix: make bytebase_group.members optional and release 3.17.3 (#193)

* fix: make bytebase_group.members optional and release 3.17.3

The terraform-plugin-sdk/v2 core schema auto-injects MinItems=1 whenever
a nested block is Required with MinItems=0 (core_schema.go:211-214), so
removing the literal MinItems:1 in #191 was not enough to allow an empty
members block — Terraform core still rejects the config with
"Insufficient members blocks" before any RPC reaches the server.

Flip members to Optional so the SDK does not reinject the constraint.

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

* test: drop stale "no members" error expectation

Step 3 of TestAccGroup_InvalidInput asserted that a bytebase_group with
no members block produces a validation error. That is exactly the
behavior this change (and #191) removes, so the step now fails with
"expected an error but got none".

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

---------

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

Author: d-bytebase

VERSION

@@ -1 +1 @@
-3.17.2
+3.17.3

provider/resource_group.go

@@ -56,7 +56,7 @@ func resourceGroup() *schema.Resource {
 			},
 			"members": {
 				Type:        schema.TypeSet,
-				Required:    true,
+				Optional:    true,
 				Description: "The members in the group.",
 				Elem: &schema.Resource{
 					Schema: map[string]*schema.Schema{

provider/resource_group_test.go

@@ -259,17 +259,6 @@ resource "bytebase_group" "%s" {
 `, identifier, identifier, identifier),
 				ExpectError: regexp.MustCompile(`expected "title" to not be an empty string`),
 			},
-			// No members
-			{
-				Config: fmt.Sprintf(`
-resource "bytebase_group" "%s" {
-	email       = "group@example.com"
-	title       = "Test Group"
-	description = "Description"
-}
-`, identifier),
-				ExpectError: regexp.MustCompile(`(expected members to have at least|At least 1 "members" blocks are required|Missing required argument)`),
-			},
 			// Invalid member format
 			{
 				Config: fmt.Sprintf(`

tutorials/0-provider.tf

@@ -1,7 +1,7 @@
 terraform {
   required_providers {
     bytebase = {
-      version = "3.17.2"
+      version = "3.17.3"
       # For local development, please use "terraform.local/bytebase/bytebase" instead
       source = "registry.terraform.io/bytebase/bytebase"
     }