feat: Add org metadata endpoint to billing details

proto/sentry_protos/billing/v1/services/billing_details/v1/endpoint_get_organization_metadata.proto

@@ -0,0 +1,22 @@
+syntax = "proto3";
+
+package sentry_protos.billing.v1.services.billing_details.v1;
+
+// Fetches lightweight identity fields for an organization. Used by callers
+// that need slug/name/default_user_id without pulling the full Organization
+// record across service boundaries.
+message GetOrganizationMetadataRequest {
+  uint64 organization_id = 1;
+}
+
+message GetOrganizationMetadataResponse {
+  string slug = 1;
+  string name = 2;
+  // Unset when the organization has no default owner.
+  optional uint64 default_user_id = 3;
+  // Email of the default owner.
+  optional string default_owner_email = 4;
+  // Emails of every active org member whose role grants the "org:billing"
+  // scope (e.g. owner, manager, billing).
+  repeated string billing_role_emails = 5;
+}

rust/src/sentry_protos.billing.v1.services.billing_details.v1.rs

@@ -42,6 +42,31 @@ pub struct GetBillingDetailsResponse {
     #[prost(message, optional, tag = "1")]
     pub billing_details: ::core::option::Option<BillingDetails>,
 }
+/// Fetches lightweight identity fields for an organization. Used by callers
+/// that need slug/name/default_user_id without pulling the full Organization
+/// record across service boundaries.
+#[derive(Clone, Copy, PartialEq, Eq, Hash, ::prost::Message)]
+pub struct GetOrganizationMetadataRequest {
+    #[prost(uint64, tag = "1")]
+    pub organization_id: u64,
+}
+#[derive(Clone, PartialEq, Eq, Hash, ::prost::Message)]
+pub struct GetOrganizationMetadataResponse {
+    #[prost(string, tag = "1")]
+    pub slug: ::prost::alloc::string::String,
+    #[prost(string, tag = "2")]
+    pub name: ::prost::alloc::string::String,
+    /// Unset when the organization has no default owner.
+    #[prost(uint64, optional, tag = "3")]
+    pub default_user_id: ::core::option::Option<u64>,
+    /// Email of the default owner.
+    #[prost(string, optional, tag = "4")]
+    pub default_owner_email: ::core::option::Option<::prost::alloc::string::String>,
+    /// Emails of every active org member whose role grants the "org:billing"
+    /// scope (e.g. owner, manager, billing).
+    #[prost(string, repeated, tag = "5")]
+    pub billing_role_emails: ::prost::alloc::vec::Vec<::prost::alloc::string::String>,
+}
 #[derive(Clone, Copy, PartialEq, Eq, Hash, ::prost::Message)]
 pub struct GetStripePaymentDataRequest {
     #[prost(uint64, tag = "1")]