feat: implement UpdateZitadelProvider in ManagementService (#12384)

# Which Problems Are Solved

This PR adds support for updating ZITADEL identity provider (IDP)
templates.

# How the Problems Are Solved

- Implements `UpdateZitadelProvider` in the Management gRPC server plus
converter
- Introduces an org-scoped `ZitadelIDPChanged` event and registers its
event mapper.
- Adds command-side support to update org Zitadel providers and appends
the new event to the org write model.
- Extends the IDP template projection reducer to accept org change
events.

# Additional Changes
N/A

# Additional Context
Closes https://github.com/zitadel/zitadel/issues/11922
Follow up for PRs:

- https://github.com/zitadel/zitadel/pull/12018
- https://github.com/zitadel/zitadel/pull/12020
- https://github.com/zitadel/zitadel/pull/12055
- https://github.com/zitadel/zitadel/pull/12056
- https://github.com/zitadel/zitadel/pull/12371
- https://github.com/zitadel/zitadel/pull/12378

---------

Co-authored-by: Copilot Autofix powered by AI <[email protected]>
Co-authored-by: Livio Spring <[email protected]>

internal/repository/org/eventstore.go

@@ -104,6 +104,7 @@ func init() {
 	eventstore.RegisterFilterEventMapper(AggregateType, SAMLIDPAddedEventType, SAMLIDPAddedEventMapper)
 	eventstore.RegisterFilterEventMapper(AggregateType, SAMLIDPChangedEventType, SAMLIDPChangedEventMapper)
 	eventstore.RegisterFilterEventMapper(AggregateType, ZitadelIDPAddedEventType, eventstore.GenericEventMapper[ZitadelIDPAddedEvent])
+	eventstore.RegisterFilterEventMapper(AggregateType, ZitadelIDPChangedEventType, eventstore.GenericEventMapper[ZitadelIDPChangedEvent])
 	eventstore.RegisterFilterEventMapper(AggregateType, IDPRemovedEventType, IDPRemovedEventMapper)
 	eventstore.RegisterFilterEventMapper(AggregateType, TriggerActionsSetEventType, TriggerActionsSetEventMapper)
 	eventstore.RegisterFilterEventMapper(AggregateType, TriggerActionsCascadeRemovedEventType, TriggerActionsCascadeRemovedEventMapper)

internal/repository/org/idp.go

@@ -39,6 +39,7 @@ const (
 	SAMLIDPChangedEventType             eventstore.EventType = "org.idp.saml.changed"
 	IDPRemovedEventType                 eventstore.EventType = "org.idp.removed"
 	ZitadelIDPAddedEventType            eventstore.EventType = "org.idp.zitadel.added"
+	ZitadelIDPChangedEventType          eventstore.EventType = "org.idp.zitadel.changed"
 )
 
 type OAuthIDPAddedEvent struct {
@@ -1171,3 +1172,29 @@ func NewZitadelIDPAddedEvent(
 func (e *ZitadelIDPAddedEvent) SetBaseEvent(event *eventstore.BaseEvent) {
 	e.BaseEvent = *event
 }
+
+type ZitadelIDPChangedEvent struct {
+	idp.ZitadelIDPChangedEvent
+}
+
+func NewZitadelIDPChangedEvent(
+	ctx context.Context,
+	aggregate *eventstore.Aggregate,
+	id string,
+	changes []idp.ZitadelIDPChanges,
+) *ZitadelIDPChangedEvent {
+	changedEvent := idp.NewZitadelIDPChangedEvent(
+		eventstore.NewBaseEventForPush(
+			ctx,
+			aggregate,
+			ZitadelIDPChangedEventType,
+		),
+		id,
+		changes,
+	)
+	return &ZitadelIDPChangedEvent{ZitadelIDPChangedEvent: *changedEvent}
+}
+
+func (e *ZitadelIDPChangedEvent) SetBaseEvent(event *eventstore.BaseEvent) {
+	e.BaseEvent = *event
+}