v0.3.0 — Dynamic Proxy Target, Request Filters, Provider Editing & Data Retention

New Features

Dynamic Proxy Target — change the proxy forwarding target at runtime via POST /api/proxy/target or by clicking a provider card in the UI; backed by atomic target URL storage
Request Filtering — filter intercepted requests by provider, endpoint/path, and date range (from/to) on the Requests tab
Provider Editing — edit provider name and URL inline via the new edit button on provider cards; backed by PATCH /api/dashboard/providers/{id}
Filter Options API — GET /api/dashboard/filters returns distinct providers and endpoints to populate filter dropdowns
Data Retention — new -retention flag auto-purges benchmark data older than N hours (0 = disable)

Provider URL validation on add/update: rejects non-http:///https:// schemes with a 400 error
More accurate token counting: the proxy interceptor now tracks SSE data: lines as tokens, using the max of all three counting methods
X-Target-Provider header scheme validation: unsupported schemes are logged and fall through to the default target
Scheduled benchmarks update their last-run status to "completed" on success
UI layout: proper scroll containment, separate filtered/unfiltered stats, auto-refresh of filtered stats on polling

Panic recovery (defer/recover) added to all background goroutines — benchmark runs, health poller, scheduler, parallel scaling workers — preventing a single panic from crashing the server
Provider update returns a proper error if the provider ID does not exist
Cleaner request body handling on read errors

New API routes: POST /api/proxy/target, PATCH /api/dashboard/providers/{id}, GET /api/dashboard/filters
New CLI flag: -retention
React ProviderCard component extracted for reuse
Added sync/atomic and net/url imports

Refactor panic recovery, add dynamic proxy config, and update provider logic by @codewithwest in #3

Full Changelog: v0.2.0...v0.3.0

Refactor panic recovery, add dynamic proxy config, and update provider logic by @codewithwest in #3

Full Changelog: v0.2.0...v0.3.0