feat: User metadata (#2025)

* feat: user meta data events

* feat: user meta data set tests

* feat: user meta data tests

* feat: user meta data in protos

* feat: user meta data command api

* feat: user meta data query side

* feat: proto correct order, fix handlers

* feat: proto correct order

* feat: fixes of pr comments

* feat: fixes of pr comments

* feat: value as byte array

* feat: metadata feature

* Update internal/auth/repository/eventsourcing/handler/meta_data.go

Co-authored-by: Silvan <silvan.reusser@gmail.com>

* Update internal/command/user_meta_data.go

Co-authored-by: Silvan <silvan.reusser@gmail.com>

* Update proto/zitadel/metadata.proto

Co-authored-by: Silvan <silvan.reusser@gmail.com>

* Update proto/zitadel/metadata.proto

Co-authored-by: Silvan <silvan.reusser@gmail.com>

* fix: rename metadata files and table

* fix: rename meta data to metadat in protos

* Update internal/domain/metadata.go

Co-authored-by: Silvan <silvan.reusser@gmail.com>

* fix: rename vars

* fix: rebiuld docs

* Update internal/iam/repository/view/metadata_view.go

Co-authored-by: Silvan <silvan.reusser@gmail.com>

Co-authored-by: Silvan <silvan.reusser@gmail.com>

internal/domain/metadata.go

@@ -0,0 +1,83 @@
+package domain
+
+import (
+	"time"
+
+	caos_errors "github.com/caos/zitadel/internal/errors"
+	es_models "github.com/caos/zitadel/internal/eventstore/v1/models"
+)
+
+type Metadata struct {
+	es_models.ObjectRoot
+
+	State MetadataState
+	Key   string
+	Value []byte
+}
+
+type MetadataState int32
+
+const (
+	MetadataStateUnspecified MetadataState = iota
+	MetadataStateActive
+	MetadataStateRemoved
+)
+
+func (m *Metadata) IsValid() bool {
+	return m.Key != "" && len(m.Value) > 0
+}
+
+func (s MetadataState) Exists() bool {
+	return s != MetadataStateUnspecified && s != MetadataStateRemoved
+}
+
+type MetadataSearchRequest struct {
+	Offset        uint64
+	Limit         uint64
+	SortingColumn MetadataSearchKey
+	Asc           bool
+	Queries       []*MetadataSearchQuery
+}
+
+type MetadataSearchKey int32
+
+const (
+	MetadataSearchKeyUnspecified MetadataSearchKey = iota
+	MetadataSearchKeyAggregateID
+	MetadataSearchKeyResourceOwner
+	MetadataSearchKeyKey
+	MetadataSearchKeyValue
+)
+
+type MetadataSearchQuery struct {
+	Key    MetadataSearchKey
+	Method SearchMethod
+	Value  interface{}
+}
+
+type MetadataSearchResponse struct {
+	Offset      uint64
+	Limit       uint64
+	TotalResult uint64
+	Result      []*Metadata
+	Sequence    uint64
+	Timestamp   time.Time
+}
+
+func (r *MetadataSearchRequest) EnsureLimit(limit uint64) error {
+	if r.Limit > limit {
+		return caos_errors.ThrowInvalidArgument(nil, "SEARCH-0ds32", "Errors.Limit.ExceedsDefault")
+	}
+	if r.Limit == 0 {
+		r.Limit = limit
+	}
+	return nil
+}
+
+func (r *MetadataSearchRequest) AppendAggregateIDQuery(aggregateID string) {
+	r.Queries = append(r.Queries, &MetadataSearchQuery{Key: MetadataSearchKeyAggregateID, Method: SearchMethodEquals, Value: aggregateID})
+}
+
+func (r *MetadataSearchRequest) AppendResourceOwnerQuery(resourceOwner string) {
+	r.Queries = append(r.Queries, &MetadataSearchQuery{Key: MetadataSearchKeyResourceOwner, Method: SearchMethodEquals, Value: resourceOwner})
+}