feat(ai): implementar DORA 2025 AI Capability 7 - Healthy Data Ecosystems - TASK-026

Implementacion completa de Healthy Data Ecosystems:

Data Quality Monitoring:
- DataQualityMonitor con 5 dimensiones:
  * Completeness (25% weight, target >=95%)
  * Validity (25% weight, target >=95%)
  * Consistency (20% weight, target >=90%)
  * Timeliness (15% weight, target >=50%)
  * Accuracy (15% weight, target >=90%)
- Overall quality score (0-100)
- Automated issue detection
- Recommendations engine

Data Governance:
- DataGovernance framework v1.0.0
- Retention policies (permanent, 90d, TTL)
- Access controls (auth, rate limit, audit)
- Compliance rules (RNF-002, DATA-001, DATA-002)
- Data ownership tracking

Data Lineage:
- DataLineage con 3 data flows:
  * DORA metrics collection
  * Application logs pipeline
  * Infrastructure logs pipeline
- Transformation tracking
- Dependency mapping
- Complete lineage map

Ecosystem Health:
- EcosystemHealth monitoring
- Component health scores
- Pipeline status tracking
- Real-time health assessment
- Status: healthy/warning/critical
- Automated recommendations

Metadata Management:
- MetadataManagement registry
- Complete schema information
- Field definitions and constraints
- Index information
- Statistics (record count, size, last_updated)

API Endpoints:
- GET /api/dora/ecosystem/quality/ - Quality assessment
- GET /api/dora/ecosystem/governance/ - Governance status
- GET /api/dora/ecosystem/lineage/ - Data lineage
- GET /api/dora/ecosystem/health/ - Health status
- GET /api/dora/ecosystem/metadata/ - Metadata registry

Features:
- Comprehensive quality scoring
- Weighted quality dimensions
- Health status (healthy/warning/critical)
- Proactive issue detection
- Actionable recommendations
- Complete data lineage
- Policy compliance tracking
- Metadata-rich responses

Archivos:
- dora_metrics/data_ecosystem.py (nuevo)
- dora_metrics/views.py (actualizado)
- dora_metrics/urls.py (actualizado)
- docs/ai_capabilities/TASK-026-dora-ai-capability-7.md

Story Points: 8 SP
Estado: COMPLETADO
DORA 2025 AI Capability: 7/7 (100%)

Author: claude