AIRA-40: Incident Deduplication Service

[learn-design-develop]

👤 User Story

As the incident manager, I need deduplication service to prevent processing duplicate incidents within a 30-minute window.

🎯 Rationale

Dedup Service is critical for preventing duplicate processing.

✅ Acceptance Criteria

• Create aira/core/dedup_service.py with Redis-based deduplication
• SHA-256 hash of incident content for detection
• Redis cache with 30-minute TTL
• Store dedup hashes in PostgreSQL for audit
• Metrics tracking (hits, misses)
• Correlation-ID propagation

📋 Metadata

• Status: MVP

• Category: Core Workflow

• Week: Week 4

• Complexity: Low

• Critical Path: No

• Dependencies: AIRA-23, AIRA-21

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Original Ticket: #40
Phase 1 MVP Tracking Issue