feat(Deployment): Integrate Ansible deployment via PHP deployment pipeline

- Create AnsibleDeployStage using framework's Process module for secure command execution
- Integrate AnsibleDeployStage into DeploymentPipelineCommands for production deployments
- Add force_deploy flag support in Ansible playbook to override stale locks
- Use PHP deployment module as orchestrator (php console.php deploy:production)
- Fix ErrorAggregationInitializer to use Environment class instead of $_ENV superglobal

Architecture:
- BuildStage → AnsibleDeployStage → HealthCheckStage for production
- Process module provides timeout, error handling, and output capture
- Ansible playbook supports rollback via rollback-git-based.yml
- Zero-downtime deployments with health checks

src/Framework/Notification/Templates/ChannelTemplate.php

@@ -0,0 +1,55 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Framework\Notification\Templates;
+
+/**
+ * Channel-specific Template Customization
+ *
+ * Allows overriding title/body templates per channel
+ * Use case: Telegram supports Markdown, Email supports HTML, SMS is plain text
+ */
+final readonly class ChannelTemplate
+{
+    /**
+     * @param string|null $titleTemplate Channel-specific title template (null = use default)
+     * @param string|null $bodyTemplate Channel-specific body template (null = use default)
+     * @param array<string, mixed> $metadata Channel-specific metadata (e.g., parse_mode for Telegram)
+     */
+    public function __construct(
+        public ?string $titleTemplate = null,
+        public ?string $bodyTemplate = null,
+        public array $metadata = []
+    ) {
+    }
+
+    public static function create(
+        ?string $titleTemplate = null,
+        ?string $bodyTemplate = null
+    ): self {
+        return new self(
+            titleTemplate: $titleTemplate,
+            bodyTemplate: $bodyTemplate
+        );
+    }
+
+    public function withMetadata(array $metadata): self
+    {
+        return new self(
+            titleTemplate: $this->titleTemplate,
+            bodyTemplate: $this->bodyTemplate,
+            metadata: [...$this->metadata, ...$metadata]
+        );
+    }
+
+    public function hasCustomTitle(): bool
+    {
+        return $this->titleTemplate !== null;
+    }
+
+    public function hasCustomBody(): bool
+    {
+        return $this->bodyTemplate !== null;
+    }
+}