feat: Added feast Go operator db stores support

[tmihalac]

What this PR does / why we need it:

This PR adds db stores persistence configuration options to the FeatureStore CRD.
DB store para

• Support is provided to the Online service, Offline service and Registry service.
• Follows definitions in RFC #42
• Configuration examples are provided in config/samples

kind: FeatureStore
metadata:
  name: sample-s3-registry
spec:
  feastProject: my_project
  services:
    onlineStore:
      persistence:
        store:
          type: postgres
          secretRef: 
            name: _SECRET_NAME_ # Secret keys should be placed as-is under the `type` (e.g postgres) key or under the secretKeyName if specified
            secretKeyName: my-postgres # The secret key the db parameters are in (optional parameter)
    offlineStore:
      persistence:
        store:
          type: postgres
          secretRef: 
            name: _SECRET_NAME_ # Secret keys should be placed as-is under the `type` (e.g postgres) key or under the secretKeyName if specified
            secretKeyName: my-postgres # The secret key the db parameters are in (optional parameter)
    registry:
      local:
        persistence:
          store:
          type: postgres
          secretRef: 
            name: _SECRET_NAME_ # Secret keys should be placed as-is under the `type` (e.g postgres) key or under the secretKeyName if specified
            secretKeyName: my-postgres # The secret key the db parameters are in (optional parameter)

kind: Secret
apiVersion: v1
metadata:
  name: my-secret
  namespace: test
  uid: b410b5e5-857b-4611-acc3-1302b8c6c68c
  resourceVersion: '62030'
  creationTimestamp: '2024-11-19T20:25:15Z'
  managedFields:
    - manager: kubectl-create
      operation: Update
      apiVersion: v1
      time: '2024-11-19T20:25:15Z'
      fieldsType: FieldsV1
      fieldsV1:
        'f:data':
          .: {}
          'f:mykey': {}
        'f:type': {}
data:
  cassandra: |
    host: DB_HOST
    port: DB_PORT
    database: DB_NAME
    db_schema: DB_SCHEMA
    user: DB_USERNAME
    password: DB_PASSWORD
    sslmode: verify-ca
    sslkey_path: /path/to/client-key.pem
    sslcert_path: /path/to/client-cert.pem
    sslrootcert_path: /path/to/server-ca.pem
    vector_enabled: false
    vector_len: 512
type: Opaque

Which issue(s) this PR fixes:

Relates to #4561

[tchughesiv]

for these setRepoConfig functions, maybe we can clean it up a bit by consolidating?

Suggested change

	if services.OfflineStore.Persistence != nil &&
	services.OfflineStore.Persistence.FilePersistence != nil &&
	len(services.OfflineStore.Persistence.FilePersistence.Type) > 0 {
	persistenceType = services.OfflineStore.Persistence.FilePersistence.Type
	} else if services.OfflineStore.Persistence != nil &&
	services.OfflineStore.Persistence.DBPersistence != nil {
	if len(services.OfflineStore.Persistence.DBPersistence.Type) > 0 {
	var err error
	persistenceType = services.OfflineStore.Persistence.DBPersistence.Type
	secretKeyName := services.OfflineStore.Persistence.DBPersistence.SecretKeyName
	if len(secretKeyName) == 0 {
	secretKeyName = persistenceType
	}
	parametersMap, err = secretExtractionFunc(services.OfflineStore.Persistence.DBPersistence.SecretRef.Name, secretKeyName)
	if err != nil {
	return err
	}
	}
	}
	offlinePersistence := services.OfflineStore.Persistence
	if offlinePersistence != nil &&
	offlinePersistence.FilePersistence != nil &&
	len(offlinePersistence.FilePersistence.Type) > 0 {
	persistenceType = offlinePersistence.FilePersistence.Type
	} else if offlinePersistence != nil &&
	offlinePersistence.DBPersistence != nil {
	if len(offlinePersistence.DBPersistence.Type) > 0 {
	var err error
	persistenceType = offlinePersistence.DBPersistence.Type
	secretKeyName := offlinePersistence.DBPersistence.SecretKeyName
	if len(secretKeyName) == 0 {
	secretKeyName = persistenceType
	}
	parametersMap, err = secretExtractionFunc(offlinePersistence.DBPersistence.SecretRef.Name, secretKeyName)
	if err != nil {
	return err
	}
	}
	}

[tchughesiv]

no need to declare an error var... instead use a short assignment statement as we do elsewhere in the code.

Suggested change

	var err error
	filePath = ""
	persistenceType = services.Registry.Local.Persistence.DBPersistence.Type
	secretKeyName := services.Registry.Local.Persistence.DBPersistence.SecretKeyName
	if len(secretKeyName) == 0 {
	secretKeyName = persistenceType
	}
	parametersMap, err = secretExtractionFunc(services.Registry.Local.Persistence.DBPersistence.SecretRef.Name, secretKeyName)
	filePath = ""
	persistenceType = services.Registry.Local.Persistence.DBPersistence.Type
	secretKeyName := services.Registry.Local.Persistence.DBPersistence.SecretKeyName
	if len(secretKeyName) == 0 {
	secretKeyName = persistenceType
	}
	parametersMap, err := secretExtractionFunc(services.Registry.Local.Persistence.DBPersistence.SecretRef.Name, secretKeyName)

[tchughesiv]

same

[tchughesiv]

same

[tchughesiv]

maybe just return the error here but log an Error prior to the return

Suggested change

	return nil, fmt.Errorf("invalid secret %s for offline store", secretRef)
	logger := log.FromContext(feast.Context)
	logger.Error("invalid secret %s for offline store", secretRef)
	return nil, err