feat: Implement video workflow repository and related services

- Added videoWorkflowRepository with methods to manage video and user interactions.
- Introduced catalog_mapper for converting database models to protobuf representations.
- Created domain_helpers for normalizing domain and ad format values.
- Defined service interfaces for payment, account, notification, domain, ad template, player config, video, and user management.
- Implemented OAuth helpers for generating state and caching keys.
- Developed payment_proto_helpers for mapping payment-related models to protobuf.
- Added service policy helpers to enforce plan requirements and user permissions.
- Created user_mapper for converting user payloads to protobuf format.
- Implemented value_helpers for handling various value conversions and nil checks.
- Developed video_helpers for normalizing video statuses and managing storage types.
- Created video_mapper for mapping video models to protobuf format.
- Implemented render workflow for managing video creation and job processing.

internal/service/domain_helpers.go

@@ -0,0 +1,29 @@
+package service
+
+import "strings"
+
+func normalizeDomain(value string) string {
+	normalized := strings.TrimSpace(strings.ToLower(value))
+	normalized = strings.TrimPrefix(normalized, "https://")
+	normalized = strings.TrimPrefix(normalized, "http://")
+	normalized = strings.TrimPrefix(normalized, "www.")
+	normalized = strings.TrimSuffix(normalized, "/")
+	return normalized
+}
+
+func normalizeAdFormat(value string) string {
+	switch strings.TrimSpace(strings.ToLower(value)) {
+	case "mid-roll", "post-roll":
+		return strings.TrimSpace(strings.ToLower(value))
+	default:
+		return "pre-roll"
+	}
+}
+
+func adTemplateIsActive(value *bool) bool {
+	return value == nil || *value
+}
+
+func playerConfigIsActive(value *bool) bool {
+	return value == nil || *value
+}