v0.1.1 - Burst timing and local clock recovery

Fixes short-packet clock recovery and preserves measured burst timing for five minutes across dashboard restarts. Adds a real RF regression fixture and updated screenshots.

Validation: 14 local tests and GitHub Actions host tests / ESP32 build passed. Spectrum-assisted acquisition restored live weather reception. After restarting the standard dashboard, a newly captured packet at 22:43:09 America/New_York reported 65.3 F / 18.5 C and 86% RH from sensor 14AB.

Local timing is selected using physical transition coherence, without checksum-guided timing search or payload bit repair. Reception remains intermittent. Automatic cold-start acquisition reliability and the harmonic RF path remain unverified. See docs/VALIDATION.md for the full distinction between timing-assisted reception and the decoder regression.