fix(ci): Fix golangci-lint deprecated parameters and format code

- Replace deprecated skip-pkg-cache and skip-build-cache with skip-cache and skip-save-cache
- Run go fmt on all DAG-related files
- Run go mod tidy to ensure modules are clean

Fixes GitHub Actions workflow error with golangci-lint-action@v7

Author: tip-dteller

.github/workflows/release.yml

@@ -56,8 +56,8 @@ jobs:
         with:
           version: ${{ env.GOLANGCI_LINT_VERSION }}
           args: --no-config --enable-only=errcheck,gosec,ineffassign --timeout=5m
-          skip-pkg-cache: false
-          skip-build-cache: false
+          skip-cache: false
+          skip-save-cache: false
           only-new-issues: false
 
       - name: Check Code Formatting

cmd/infra/analyze.go

@@ -181,7 +181,7 @@ func buildGraphFromPlan(plan *apply.Plan) *dag.Graph {
 	// Add all operations as nodes
 	for _, op := range plan.Operations {
 		props := dag.NodeProperties{
-			EstimatedDuration: 5 * time.Second, // Default duration
+			EstimatedDuration: 5 * time.Second,     // Default duration
 			RiskLevel:         dag.RiskLevelMedium, // Default risk level
 		}
 

cmd/infra/visualize.go

@@ -41,7 +41,7 @@ func NewVisualizeCmd() *cobra.Command {
 - Mermaid: Mermaid diagram format (for markdown/documentation)
 - ASCII: Terminal-friendly ASCII art
 - JSON: Structured JSON data`,
-	Example: `  # Visualize as ASCII art in terminal
+		Example: `  # Visualize as ASCII art in terminal
   matlas infra visualize -f config.yaml
 
   # Export as Graphviz DOT format