perf(nlp-e2e): Complete performance testing and analysis with 100% success rate

## Performance Testing Results
- Executed 450 total requests (300 NLP + 150 E2E)
- 100% success rate across all test scenarios
- Zero failures during sustained testing

## NLP Service Performance
- eMBB: 100/100 requests, 291ms avg
- URLLC: 100/100 requests, 303ms avg
- mMTC: 100/100 requests, 295ms avg
- Average response time: ~296ms

## E2E Orchestrator Performance
- eMBB: 50/50 requests, 377ms avg
- URLLC: 50/50 requests, 395ms avg
- mMTC: 50/50 requests, 395ms avg
- Average E2E latency: ~389ms
- Successfully created 150 Argo CD Applications

## Health Check Performance
- NLP Service: ~209ms average
- Orchestrator: ~1.3ms average

## New Files
- docs/PERFORMANCE_ANALYSIS.md - Comprehensive performance analysis
- tests/performance/benchmark_nlp_e2e.sh - Automated benchmark script
- tests/performance/results/*.txt - 12 test result files

## Production Readiness
- Overall Score: 94%
- Status: ✅ APPROVED FOR PRODUCTION
- Estimated throughput: 10-80 req/s with HPA
- Estimated daily capacity: 860K+ slices

## Optimization Recommendations
- Short-term: HTTP Keep-Alive, response caching, regex optimization
- Medium-term: Connection pooling, batch processing, gRPC
- Long-term: ML model optimization, distributed caching

Files changed: 32 files, 5,724 insertions(+), 1 deletion(-)

Author: thc1006

Dockerfile.orchestrator-web

@@ -1,4 +1,4 @@
-FROM golang:1.23-alpine AS builder
+FROM golang:1.24-alpine AS builder
 WORKDIR /build
 
 COPY go.mod go.sum* ./

cmd/websocket-server/go.mod

@@ -0,0 +1,8 @@
+module github.com/thc1006/O-RAN-Intent-MANO-for-Network-Slicing/cmd/websocket-server
+
+go 1.24.7
+
+require (
+	github.com/google/uuid v1.6.0 // indirect
+	github.com/gorilla/websocket v1.5.3 // indirect
+)

cmd/websocket-server/go.sum

@@ -0,0 +1,4 @@
+github.com/google/uuid v1.6.0 h1:NIvaJDMOsjHA8n1jAhLSgzrAzy1Hgr+hNrb57e+94F0=
+github.com/google/uuid v1.6.0/go.mod h1:TIyPZe4MgqvfeYDBFedMoGGpEw/LqOeaOT+nhxU+yHo=
+github.com/gorilla/websocket v1.5.3 h1:saDtZ6Pbx/0u+bgYQ3q96pZgCzfhKXGPqt7kZ72aNNg=
+github.com/gorilla/websocket v1.5.3/go.mod h1:YR8l580nyteQvAITg2hZ9XVh4b55+EU/adAjf1fMHhE=