Circuit Breaker causes parallel requests to execute sequentially

[gourish25]

Describe the bug
When the circuit breaker is enabled, HTTP requests that normally execute in parallel start behaving sequentially.

For example, Without the circuit breaker, two simultaneous requests complete in ~10 seconds total. After enabling the circuit breaker, the same two requests take ~20 seconds total, indicating that the second request waits for the first one to finish.

To Reproduce
Steps to reproduce the behavior, if applicable:

1. The code is

   &gofrService.CircuitBreakerConfig{Threshold: 6, Interval: 5 * time.Second}

Screenshots

1️⃣ Without Circuit Breaker (Parallel Execution)

2️⃣ With Circuit Breaker Enabled (Sequential Execution)

First Image (without CB): Both requests complete in ~10s and total time is ~10s, confirming parallel execution.
Second Image (with CB): One request completes at ~10s and the other at ~20s, total time ~20s, showing the circuit breaker caused sequential execution.

**Environments **

• gofr version 1.25.0
• go version 1.54.0