FRE-4510: Implement feature flag checks for spam classification
- Create centralized feature flag management system (feature-flags.ts)
- Add 15 feature flags across SpamShield, VoicePrint, and Platform categories
- Update spamshield.config.ts to use checkFlag() for all flags
- Add feature flag checks to all spamshield.service.ts methods:
* NumberReputationService.checkReputation()
* NumberReputationService.checkMultiSource()
* SMSClassifierService.classify()
* CallAnalysisService.analyzeCall()
* SpamFeedbackService.recordFeedback()
- Update index.ts exports to include feature flag utilities
- Flags support runtime updates via FLAG_<KEY> environment variables
Flags implemented:
- SpamShield: enableNumberReputation, enableContentClassification,
enableBehavioralAnalysis, enableCommunityIntelligence,
enableRealTimeBlocking, enableMultipleSources, enableMLClassifier
- VoicePrint: enableMLService, enableFAISSIndex, enableBatchAnalysis,
enableRealtimeAnalysis, enableMockModel
- Platform: enableAuditLogs, enableKPITracking