Comprehensive design for:
- HTTP connection pooling with lifecycle management
- Redis caching layer (TTL for discovery, permanent for immutable)
- Abstract PackageProxyBase for multi-protocol support (npm, Maven)
- Database query optimization with batch operations
- Dependency resolution caching for ensure files
- Observability via health endpoints
Maintains hermetic build guarantees: artifact content and extracted
metadata are immutable, only discovery data uses TTL-based caching.
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