piki-core 0.5.0

Core library for Piki personal wiki application
Documentation
# Performance Optimization Initiative

**Purpose**: Reduce API p95 latency below 400ms before holiday traffic surge.

## Work Streams

1. **Caching Layer Improvements**
   - Investigate edge caching feasibility (idea captured on `frontpage.md`)
   - Benchmark Redis cluster with larger node sizes
2. **Query Optimization**
   - Audit slow queries using Datadog APM traces
   - Prioritize endpoints with > 5% error budget consumption
3. **Infrastructure**
   - Evaluate autoscaling thresholds; consider predictive scaling
   - Coordinate with SRE on blue/green deployment test

## Metrics Dashboard

- Datadog monitor: `api-latency-critical`
- Grafana board: `API Platform / Latency Overview`

## Next Checkpoint

- Present findings at Nov 4 engineering leads sync
- Provide recommendation doc with cost trade-offs