feat(epic1): implement core infrastructure (stories 1.1-1.5)

Implemented Epic 1 core kernel and infrastructure stories:

Story 1.1: Enhanced DI Container
- Added providers for database, health, metrics, and error bus
- Extended CoreModule to include all core services

Story 1.2: Database Layer with Ent ORM
- Created Ent schema for User, Role, Permission, AuditLog entities
- Implemented many-to-many relationships (User-Role, Role-Permission)
- Created database client wrapper with connection pooling
- Added database provider to DI container with migration support

Story 1.3: Health Monitoring and Metrics System
- Implemented health check registry and interface
- Added database health checker
- Created Prometheus metrics system with HTTP instrumentation
- Added health and metrics providers to DI container

Story 1.4: Error Handling and Error Bus
- Implemented channel-based error bus
- Created ErrorPublisher interface
- Added error bus provider with lifecycle management

Story 1.5: HTTP Server Foundation
- Created HTTP server with Gin framework
- Implemented comprehensive middleware stack:
  - Request ID generation
  - Structured logging
  - Panic recovery with error bus integration
  - Prometheus metrics collection
  - CORS support
- Registered core routes: /healthz, /ready, /metrics
- Integrated with FX lifecycle for graceful shutdown

All components are integrated via DI container and ready for use.

internal/ent/permission/where.go

@@ -0,0 +1,172 @@
+// Code generated by ent, DO NOT EDIT.
+
+package permission
+
+import (
+	"entgo.io/ent/dialect/sql"
+	"entgo.io/ent/dialect/sql/sqlgraph"
+	"git.dcentral.systems/toolz/goplt/internal/ent/predicate"
+)
+
+// ID filters vertices based on their ID field.
+func ID(id string) predicate.Permission {
+	return predicate.Permission(sql.FieldEQ(FieldID, id))
+}
+
+// IDEQ applies the EQ predicate on the ID field.
+func IDEQ(id string) predicate.Permission {
+	return predicate.Permission(sql.FieldEQ(FieldID, id))
+}
+
+// IDNEQ applies the NEQ predicate on the ID field.
+func IDNEQ(id string) predicate.Permission {
+	return predicate.Permission(sql.FieldNEQ(FieldID, id))
+}
+
+// IDIn applies the In predicate on the ID field.
+func IDIn(ids ...string) predicate.Permission {
+	return predicate.Permission(sql.FieldIn(FieldID, ids...))
+}
+
+// IDNotIn applies the NotIn predicate on the ID field.
+func IDNotIn(ids ...string) predicate.Permission {
+	return predicate.Permission(sql.FieldNotIn(FieldID, ids...))
+}
+
+// IDGT applies the GT predicate on the ID field.
+func IDGT(id string) predicate.Permission {
+	return predicate.Permission(sql.FieldGT(FieldID, id))
+}
+
+// IDGTE applies the GTE predicate on the ID field.
+func IDGTE(id string) predicate.Permission {
+	return predicate.Permission(sql.FieldGTE(FieldID, id))
+}
+
+// IDLT applies the LT predicate on the ID field.
+func IDLT(id string) predicate.Permission {
+	return predicate.Permission(sql.FieldLT(FieldID, id))
+}
+
+// IDLTE applies the LTE predicate on the ID field.
+func IDLTE(id string) predicate.Permission {
+	return predicate.Permission(sql.FieldLTE(FieldID, id))
+}
+
+// IDEqualFold applies the EqualFold predicate on the ID field.
+func IDEqualFold(id string) predicate.Permission {
+	return predicate.Permission(sql.FieldEqualFold(FieldID, id))
+}
+
+// IDContainsFold applies the ContainsFold predicate on the ID field.
+func IDContainsFold(id string) predicate.Permission {
+	return predicate.Permission(sql.FieldContainsFold(FieldID, id))
+}
+
+// Name applies equality check predicate on the "name" field. It's identical to NameEQ.
+func Name(v string) predicate.Permission {
+	return predicate.Permission(sql.FieldEQ(FieldName, v))
+}
+
+// NameEQ applies the EQ predicate on the "name" field.
+func NameEQ(v string) predicate.Permission {
+	return predicate.Permission(sql.FieldEQ(FieldName, v))
+}
+
+// NameNEQ applies the NEQ predicate on the "name" field.
+func NameNEQ(v string) predicate.Permission {
+	return predicate.Permission(sql.FieldNEQ(FieldName, v))
+}
+
+// NameIn applies the In predicate on the "name" field.
+func NameIn(vs ...string) predicate.Permission {
+	return predicate.Permission(sql.FieldIn(FieldName, vs...))
+}
+
+// NameNotIn applies the NotIn predicate on the "name" field.
+func NameNotIn(vs ...string) predicate.Permission {
+	return predicate.Permission(sql.FieldNotIn(FieldName, vs...))
+}
+
+// NameGT applies the GT predicate on the "name" field.
+func NameGT(v string) predicate.Permission {
+	return predicate.Permission(sql.FieldGT(FieldName, v))
+}
+
+// NameGTE applies the GTE predicate on the "name" field.
+func NameGTE(v string) predicate.Permission {
+	return predicate.Permission(sql.FieldGTE(FieldName, v))
+}
+
+// NameLT applies the LT predicate on the "name" field.
+func NameLT(v string) predicate.Permission {
+	return predicate.Permission(sql.FieldLT(FieldName, v))
+}
+
+// NameLTE applies the LTE predicate on the "name" field.
+func NameLTE(v string) predicate.Permission {
+	return predicate.Permission(sql.FieldLTE(FieldName, v))
+}
+
+// NameContains applies the Contains predicate on the "name" field.
+func NameContains(v string) predicate.Permission {
+	return predicate.Permission(sql.FieldContains(FieldName, v))
+}
+
+// NameHasPrefix applies the HasPrefix predicate on the "name" field.
+func NameHasPrefix(v string) predicate.Permission {
+	return predicate.Permission(sql.FieldHasPrefix(FieldName, v))
+}
+
+// NameHasSuffix applies the HasSuffix predicate on the "name" field.
+func NameHasSuffix(v string) predicate.Permission {
+	return predicate.Permission(sql.FieldHasSuffix(FieldName, v))
+}
+
+// NameEqualFold applies the EqualFold predicate on the "name" field.
+func NameEqualFold(v string) predicate.Permission {
+	return predicate.Permission(sql.FieldEqualFold(FieldName, v))
+}
+
+// NameContainsFold applies the ContainsFold predicate on the "name" field.
+func NameContainsFold(v string) predicate.Permission {
+	return predicate.Permission(sql.FieldContainsFold(FieldName, v))
+}
+
+// HasRolePermissions applies the HasEdge predicate on the "role_permissions" edge.
+func HasRolePermissions() predicate.Permission {
+	return predicate.Permission(func(s *sql.Selector) {
+		step := sqlgraph.NewStep(
+			sqlgraph.From(Table, FieldID),
+			sqlgraph.Edge(sqlgraph.O2M, false, RolePermissionsTable, RolePermissionsColumn),
+		)
+		sqlgraph.HasNeighbors(s, step)
+	})
+}
+
+// HasRolePermissionsWith applies the HasEdge predicate on the "role_permissions" edge with a given conditions (other predicates).
+func HasRolePermissionsWith(preds ...predicate.RolePermission) predicate.Permission {
+	return predicate.Permission(func(s *sql.Selector) {
+		step := newRolePermissionsStep()
+		sqlgraph.HasNeighborsWith(s, step, func(s *sql.Selector) {
+			for _, p := range preds {
+				p(s)
+			}
+		})
+	})
+}
+
+// And groups predicates with the AND operator between them.
+func And(predicates ...predicate.Permission) predicate.Permission {
+	return predicate.Permission(sql.AndPredicates(predicates...))
+}
+
+// Or groups predicates with the OR operator between them.
+func Or(predicates ...predicate.Permission) predicate.Permission {
+	return predicate.Permission(sql.OrPredicates(predicates...))
+}
+
+// Not applies the not operator on the given predicate.
+func Not(p predicate.Permission) predicate.Permission {
+	return predicate.Permission(sql.NotPredicates(p))
+}