🚀 Pull Request Title

Improve Test Reporting: Separate Execution Time & Wait Time while keeping Total Runtime

📘 Overview

This PR enhances the accuracy and clarity of test performance metrics reported by Keploy.

Previously, all delays — including actual processing time and artificial waits — were mixed into the single TimeTaken value.
Now, the metrics are broken down into:

🕒 ExecutionTime — Real request processing duration
⏳ WaitTime — Artificial waits (configured delays or internal sleeps)
🧮 TotalRuntime (TimeTaken) — ExecutionTime + WaitTime (backward compatible)

This helps in better debugging, performance profiling, and benchmarking.

🔧 Code Changes

• pkg/models/testrun.go

• Added ExecutionTime and WaitTime fields to TestReport + TestResult

• pkg/service/replay/replay.go

• Wrapped SimulateRequest() timing for accurate execution duration
• Counted sleep/delay in WaitTime
• Updated summary printer to display breakdown

Example Updated Logs Output:
Execution time: 3.12s
User wait time: 5.00s
Total runtime: 8.12s

🧪 How to Test

Run a test set with a configured delay:
keploy test -c "go run main.go" --delay 5

Expected:
• ExecutionTime ≈ real processing time
• WaitTime ≈ 5 seconds
• Total runtime = sum of both

🎯 Benefits

✔ More accurate timing insights
✔ Easy identification of bottlenecks
✔ Better performance benchmarking
✔ Still fully backward compatible

🔍 Notes for Reviewers

• Validate that coverage and mocks remain unaffected
• Check reports for both CLI logs and stored YAML/JSON
• No breaking changes expected — backward compatibility preserved

📎 Ticket Reference

Closes: (Add issue link if exists)

✔ Checklist

• [✔ ] Code builds successfully
• [ ✔] Tested with multiple test sets
• [ ✔] No regressions in report format
• [✔ ] Documentation updated if needed

Issue: #3351