feat: Add runtime metrics for HTTP requests and database queries (v0.1.0)

- Add RuntimeCollector class for tracking request lifecycle metrics
- Add wordpress_http_requests_total counter (method, status, endpoint)
- Add wordpress_http_request_duration_seconds histogram
- Add wordpress_db_queries_total counter (endpoint)
- Add wordpress_db_query_duration_seconds histogram (requires SAVEQUERIES)
- Update Collector to expose stored runtime metrics
- Add new settings options for enabling/disabling runtime metrics
- Create translation files (.pot, .po, .mo) for internationalization
- Update documentation and changelog

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

CHANGELOG.md

@@ -5,6 +5,25 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## [0.1.0] - 2026-02-02
+
+### Added
+
+- HTTP request metrics:
+  - `wordpress_http_requests_total` - Counter of HTTP requests by method, status code, and endpoint
+  - `wordpress_http_request_duration_seconds` - Histogram of request durations
+- Database query metrics:
+  - `wordpress_db_queries_total` - Counter of database queries by endpoint
+  - `wordpress_db_query_duration_seconds` - Histogram of query durations (requires SAVEQUERIES)
+- RuntimeCollector class for collecting metrics during WordPress request lifecycle
+- New settings options for enabling/disabling runtime metrics
+- Translation files (.pot, .po, .mo) for German (Switzerland)
+
+### Changed
+
+- Metrics are now categorized into static metrics (users, posts, etc.) and runtime metrics (HTTP, database)
+- Runtime metrics only collected when explicitly enabled and license is valid
+
 ## [0.0.2] - 2026-02-01
 
 ### Fixed