feat(epic2): Implement core authentication and authorization services

- Implement Audit Service (2.5)
  - gRPC server with Record and Query operations
  - Database persistence with audit schema
  - Service registry integration
  - Entry point: cmd/audit-service

- Implement Identity Service (2.2)
  - User CRUD operations
  - Password hashing with argon2id
  - Email verification and password reset flows
  - Entry point: cmd/identity-service
  - Fix package naming conflicts in user_service.go

- Implement Auth Service (2.1)
  - JWT token generation and validation
  - Login, RefreshToken, ValidateToken, Logout RPCs
  - Integration with Identity Service
  - Entry point: cmd/auth-service
  - Note: RefreshToken entity needs Ent generation

- Implement Authz Service (2.3, 2.4)
  - Permission checking and authorization
  - User roles and permissions retrieval
  - RBAC-based authorization
  - Entry point: cmd/authz-service

- Implement gRPC clients for all services
  - Auth, Identity, Authz, and Audit clients
  - Service discovery integration
  - Full gRPC communication

- Add service configurations to config/default.yaml
- Create SUMMARY.md with implementation details and testing instructions
- Fix compilation errors in Identity Service (password package conflicts)
- All services build successfully and tests pass

ent/role/role.go

@@ -0,0 +1,39 @@
+// Code generated by ent, DO NOT EDIT.
+
+package role
+
+import (
+	"entgo.io/ent/dialect/sql"
+)
+
+const (
+	// Label holds the string label denoting the role type in the database.
+	Label = "role"
+	// FieldID holds the string denoting the id field in the database.
+	FieldID = "id"
+	// Table holds the table name of the role in the database.
+	Table = "roles"
+)
+
+// Columns holds all SQL columns for role fields.
+var Columns = []string{
+	FieldID,
+}
+
+// ValidColumn reports if the column name is valid (part of the table columns).
+func ValidColumn(column string) bool {
+	for i := range Columns {
+		if column == Columns[i] {
+			return true
+		}
+	}
+	return false
+}
+
+// OrderOption defines the ordering options for the Role queries.
+type OrderOption func(*sql.Selector)
+
+// ByID orders the results by the id field.
+func ByID(opts ...sql.OrderTermOption) OrderOption {
+	return sql.OrderByField(FieldID, opts...).ToFunc()
+}

ent/role/where.go

@@ -0,0 +1,68 @@
+// Code generated by ent, DO NOT EDIT.
+
+package role
+
+import (
+	"entgo.io/ent/dialect/sql"
+	"git.dcentral.systems/toolz/goplt/ent/predicate"
+)
+
+// ID filters vertices based on their ID field.
+func ID(id int) predicate.Role {
+	return predicate.Role(sql.FieldEQ(FieldID, id))
+}
+
+// IDEQ applies the EQ predicate on the ID field.
+func IDEQ(id int) predicate.Role {
+	return predicate.Role(sql.FieldEQ(FieldID, id))
+}
+
+// IDNEQ applies the NEQ predicate on the ID field.
+func IDNEQ(id int) predicate.Role {
+	return predicate.Role(sql.FieldNEQ(FieldID, id))
+}
+
+// IDIn applies the In predicate on the ID field.
+func IDIn(ids ...int) predicate.Role {
+	return predicate.Role(sql.FieldIn(FieldID, ids...))
+}
+
+// IDNotIn applies the NotIn predicate on the ID field.
+func IDNotIn(ids ...int) predicate.Role {
+	return predicate.Role(sql.FieldNotIn(FieldID, ids...))
+}
+
+// IDGT applies the GT predicate on the ID field.
+func IDGT(id int) predicate.Role {
+	return predicate.Role(sql.FieldGT(FieldID, id))
+}
+
+// IDGTE applies the GTE predicate on the ID field.
+func IDGTE(id int) predicate.Role {
+	return predicate.Role(sql.FieldGTE(FieldID, id))
+}
+
+// IDLT applies the LT predicate on the ID field.
+func IDLT(id int) predicate.Role {
+	return predicate.Role(sql.FieldLT(FieldID, id))
+}
+
+// IDLTE applies the LTE predicate on the ID field.
+func IDLTE(id int) predicate.Role {
+	return predicate.Role(sql.FieldLTE(FieldID, id))
+}
+
+// And groups predicates with the AND operator between them.
+func And(predicates ...predicate.Role) predicate.Role {
+	return predicate.Role(sql.AndPredicates(predicates...))
+}
+
+// Or groups predicates with the OR operator between them.
+func Or(predicates ...predicate.Role) predicate.Role {
+	return predicate.Role(sql.OrPredicates(predicates...))
+}
+
+// Not applies the not operator on the given predicate.
+func Not(p predicate.Role) predicate.Role {
+	return predicate.Role(sql.NotPredicates(p))
+}