Update README.md

Replace TTS-copied README with ASR-correct version (fix wrong-project badges, update model-index dataset id, drop placeholder image)

Upload model weights (RL iter_9, sha256 3c453ea9...)

Initial release: MOSS-Transcribe-preview-2B (rebranded from internal Musci-ASR-2.4B v2 = RL iter_9 giga80-kl01)

initial commit