feat: Add domain events to Identity module (#1167)

Add domain events for identity-related operations:
- UserRegisteredEvent: Raised when a new user registers
- PasswordChangedEvent: Raised when a user changes password
- UserRoleAssignedEvent: Raised when roles are assigned to a user
- UserActivatedEvent: Raised when a user account is activated
- UserDeactivatedEvent: Raised when a user account is deactivated
- SessionRevokedEvent: Raised when a user session is revoked

All events inherit from DomainEvent base record and include:
- EventId, OccurredOnUtc, CorrelationId, TenantId (from base)
- Relevant domain-specific data
- Static factory method for convenient creation

Co-authored-by: jarvis <jarvis@codewithmukesh.com>

Author: iammukeshm

src/Modules/Identity/Modules.Identity/Domain/Events/PasswordChangedEvent.cs

@@ -0,0 +1,17 @@
+using FSH.Framework.Core.Domain;
+
+namespace FSH.Modules.Identity.Domain.Events;
+
+/// <summary>Raised when a user changes their password.</summary>
+public sealed record PasswordChangedEvent(
+    Guid EventId,
+    DateTimeOffset OccurredOnUtc,
+    string UserId,
+    bool WasReset,
+    string? CorrelationId = null,
+    string? TenantId = null
+) : DomainEvent(EventId, OccurredOnUtc, CorrelationId, TenantId)
+{
+    public static PasswordChangedEvent Create(string userId, bool wasReset = false, string? correlationId = null, string? tenantId = null)
+        => new(Guid.NewGuid(), DateTimeOffset.UtcNow, userId, wasReset, correlationId, tenantId);
+}

src/Modules/Identity/Modules.Identity/Domain/Events/SessionRevokedEvent.cs

@@ -0,0 +1,19 @@
+using FSH.Framework.Core.Domain;
+
+namespace FSH.Modules.Identity.Domain.Events;
+
+/// <summary>Raised when a user session is revoked.</summary>
+public sealed record SessionRevokedEvent(
+    Guid EventId,
+    DateTimeOffset OccurredOnUtc,
+    string UserId,
+    Guid SessionId,
+    string? RevokedBy,
+    string? Reason,
+    string? CorrelationId = null,
+    string? TenantId = null
+) : DomainEvent(EventId, OccurredOnUtc, CorrelationId, TenantId)
+{
+    public static SessionRevokedEvent Create(string userId, Guid sessionId, string? revokedBy = null, string? reason = null, string? correlationId = null, string? tenantId = null)
+        => new(Guid.NewGuid(), DateTimeOffset.UtcNow, userId, sessionId, revokedBy, reason, correlationId, tenantId);
+}

src/Modules/Identity/Modules.Identity/Domain/Events/UserActivatedEvent.cs

@@ -0,0 +1,17 @@
+using FSH.Framework.Core.Domain;
+
+namespace FSH.Modules.Identity.Domain.Events;
+
+/// <summary>Raised when a user account is activated.</summary>
+public sealed record UserActivatedEvent(
+    Guid EventId,
+    DateTimeOffset OccurredOnUtc,
+    string UserId,
+    string? ActivatedBy,
+    string? CorrelationId = null,
+    string? TenantId = null
+) : DomainEvent(EventId, OccurredOnUtc, CorrelationId, TenantId)
+{
+    public static UserActivatedEvent Create(string userId, string? activatedBy = null, string? correlationId = null, string? tenantId = null)
+        => new(Guid.NewGuid(), DateTimeOffset.UtcNow, userId, activatedBy, correlationId, tenantId);
+}

src/Modules/Identity/Modules.Identity/Domain/Events/UserDeactivatedEvent.cs

@@ -0,0 +1,18 @@
+using FSH.Framework.Core.Domain;
+
+namespace FSH.Modules.Identity.Domain.Events;
+
+/// <summary>Raised when a user account is deactivated.</summary>
+public sealed record UserDeactivatedEvent(
+    Guid EventId,
+    DateTimeOffset OccurredOnUtc,
+    string UserId,
+    string? DeactivatedBy,
+    string? Reason,
+    string? CorrelationId = null,
+    string? TenantId = null
+) : DomainEvent(EventId, OccurredOnUtc, CorrelationId, TenantId)
+{
+    public static UserDeactivatedEvent Create(string userId, string? deactivatedBy = null, string? reason = null, string? correlationId = null, string? tenantId = null)
+        => new(Guid.NewGuid(), DateTimeOffset.UtcNow, userId, deactivatedBy, reason, correlationId, tenantId);
+}

src/Modules/Identity/Modules.Identity/Domain/Events/UserRegisteredEvent.cs

@@ -0,0 +1,19 @@
+using FSH.Framework.Core.Domain;
+
+namespace FSH.Modules.Identity.Domain.Events;
+
+/// <summary>Raised when a new user registers in the system.</summary>
+public sealed record UserRegisteredEvent(
+    Guid EventId,
+    DateTimeOffset OccurredOnUtc,
+    string UserId,
+    string Email,
+    string? FirstName,
+    string? LastName,
+    string? CorrelationId = null,
+    string? TenantId = null
+) : DomainEvent(EventId, OccurredOnUtc, CorrelationId, TenantId)
+{
+    public static UserRegisteredEvent Create(string userId, string email, string? firstName = null, string? lastName = null, string? correlationId = null, string? tenantId = null)
+        => new(Guid.NewGuid(), DateTimeOffset.UtcNow, userId, email, firstName, lastName, correlationId, tenantId);
+}

src/Modules/Identity/Modules.Identity/Domain/Events/UserRoleAssignedEvent.cs

@@ -0,0 +1,17 @@
+using FSH.Framework.Core.Domain;
+
+namespace FSH.Modules.Identity.Domain.Events;
+
+/// <summary>Raised when roles are assigned to a user.</summary>
+public sealed record UserRoleAssignedEvent(
+    Guid EventId,
+    DateTimeOffset OccurredOnUtc,
+    string UserId,
+    IReadOnlyList<string> AssignedRoles,
+    string? CorrelationId = null,
+    string? TenantId = null
+) : DomainEvent(EventId, OccurredOnUtc, CorrelationId, TenantId)
+{
+    public static UserRoleAssignedEvent Create(string userId, IEnumerable<string> assignedRoles, string? correlationId = null, string? tenantId = null)
+        => new(Guid.NewGuid(), DateTimeOffset.UtcNow, userId, assignedRoles.ToList().AsReadOnly(), correlationId, tenantId);
+}