Restructure project: Move AKS cluster to beispiel-k8s-cluster directory

Major improvements:
- Import existing Azure AKS cluster with aztfexport
- Optimize VM size from Standard_D4d_v4 to Standard_D2as_v6 (50% cost reduction)
- Configure availability zones to [1, 2]
- Add comprehensive monitoring setup:
  * New Log Analytics Workspace
  * OMS Agent integration
  * Data Collection Rule for Container Insights
  * Email alerts for CPU and Memory
- Refactor configuration:
  * Extract all values to variables.tf
  * Rename resources with meaningful names
  * Add detailed outputs.tf
- Add project documentation:
  * Comprehensive README.md
  * cluster-status-commands.md with useful Azure CLI commands
  * terraform.tfvars.example template
  * .gitignore for sensitive files

Infrastructure changes:
- Resource Group: trusted_ai_demo_rg (Germany West Central)
- AKS Cluster: trai_k8s_cluster (Kubernetes 1.33)
- Node Pool: 2-3 nodes with auto-scaling
- Network: VNet 10.0.0.0/16, Subnet 10.0.0.0/24
- Monitoring: Full Container Insights with alerts

Cost optimization: ~€75/month (down from ~€140/month)

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

beispiel-terraform/beispiel-k8s-cluster/.gitignore

@@ -0,0 +1,48 @@
+# Local .terraform directories
+**/.terraform/*
+
+# .tfstate files
+*.tfstate
+*.tfstate.*
+
+# Crash log files
+crash.log
+crash.*.log
+
+# Exclude all .tfvars files, which are likely to contain sensitive data
+*.tfvars
+*.tfvars.json
+
+# Ignore override files as they are usually used to override resources locally
+override.tf
+override.tf.json
+*_override.tf
+*_override.tf.json
+
+# Include override files you do wish to add to version control using negation pattern
+# !example_override.tf
+
+# Include tfplan files to ignore the plan output of command: terraform plan -out=tfplan
+*tfplan*
+
+# Ignore CLI configuration files
+.terraformrc
+terraform.rc
+
+# Ignore aztfexport generated files (optional, keep if you want version history)
+aztfexportResourceMapping.json
+aztfexportSkippedResources.txt
+
+# Ignore Mac OS files
+.DS_Store
+
+# Ignore editor/IDE files
+.vscode/
+.idea/
+*.swp
+*.swo
+*~
+
+# Ignore kubeconfig
+kubeconfig
+*.kubeconfig