feat: Add Terraform configuration for AWS (#2)

* feat: Add Terraform configuration for AWS

* feat: Update data models to use string identifiers and add DynamoDB table configurations

* feat: Update Terraform S3 backend configuration

tasker-server/terraform/cognito.tf

@@ -0,0 +1,91 @@
+resource "aws_cognito_user_pool" "tasker_cognito_user_pool" {
+  name = "tasker-cognito-user-pool"
+
+  # Sign-in options
+  alias_attributes = ["preferred_username", "email"]
+
+  # User name requirements
+  username_configuration {
+    case_sensitive = true
+  }
+
+  # Password policy
+  password_policy {
+    minimum_length    = 8
+    require_uppercase = false
+    require_lowercase = false
+    require_numbers   = false
+    require_symbols   = false
+  }
+
+  # MFA settings
+  mfa_configuration = "OFF"
+
+  # Account recovery
+  account_recovery_setting {
+    recovery_mechanism {
+      name     = "verified_email"
+      priority = 1
+    }
+  }
+
+  # Auto-verified attributes
+  auto_verified_attributes = ["email"]
+
+  # Self-registration and message delivery
+  admin_create_user_config {
+    allow_admin_create_user_only = false # Enable self-registration
+  }
+
+  verification_message_template {
+    default_email_option = "CONFIRM_WITH_CODE"
+    email_subject        = "Tasker - Verify your email address"
+    email_message        = "Your verification code is {####}."
+  }
+
+  user_attribute_update_settings {
+    attributes_require_verification_before_update = ["email"]
+  }
+
+  tags = {
+    Environment = "Dev"
+  }
+}
+
+resource "aws_cognito_user_pool_client" "tasker_cognito_client" {
+  name            = "tasker-cognito-client"
+  user_pool_id    = aws_cognito_user_pool.tasker_cognito_user_pool.id
+  generate_secret = false
+
+  allowed_oauth_flows          = []
+  allowed_oauth_scopes         = []
+  supported_identity_providers = ["COGNITO"]
+
+  prevent_user_existence_errors = "ENABLED"
+}
+
+resource "aws_cognito_user_pool_domain" "tasker_cognito_domain" {
+  domain       = "tasker"
+  user_pool_id = aws_cognito_user_pool.tasker_cognito_user_pool.id
+}
+
+resource "aws_ssm_parameter" "user_pool_id" {
+  name        = "/tasker/cognito/user-pool-id"
+  description = "Tasker Cognito User Pool ID"
+  type        = "String"
+  value       = aws_cognito_user_pool.tasker_cognito_user_pool.id
+}
+
+resource "aws_ssm_parameter" "client_id" {
+  name        = "/tasker/cognito/client-id"
+  description = "Tasker Cognito Client ID"
+  type        = "String"
+  value       = aws_cognito_user_pool_client.tasker_cognito_client.id
+}
+
+resource "aws_ssm_parameter" "cognito_domain" {
+  name        = "/tasker/cognito/domain"
+  description = "Tasker Cognito Domain"
+  type        = "String"
+  value       = aws_cognito_user_pool_domain.tasker_cognito_domain.domain
+}