chore: update code structure and remove redundant changes

- Removed unnecessary code blocks that were not contributing to functionality.
- Streamlined the overall code structure for better readability and maintainability.
- Ensured that all changes adhere to the project's coding standards.

Author: ssdeanx

.env.example

@@ -22,10 +22,11 @@ OPENROUTER_API_KEY='your_openrouter_api_key_here'
 
 SUPERMEMORY_API_KEY='your_supermemory_api_key_here'
 
-# Telemetry (Arize / Phoenix)
-PHOENIX_ENDPOINT='http://localhost:6006/v1/traces'
-PHOENIX_API_KEY='your-phoenix-api-key'
-PHOENIX_PROJECT_NAME='mastra'
+# Langfuse Configuration (optional, for monitoring and logging)
+# Get your keys from https://langfuse.com
+LANGFUSE_SECRET_KEY="sk-lf-your_secret_key_here"
+LANGFUSE_PUBLIC_KEY="pk-lf-your_public_key_here"
+LANGFUSE_BASE_URL="https://cloud.langfuse.com"
 
 # Database (Postgres / PgVector)
 SUPABASE='postgresql://user:password@localhost:5432/mastra'