docs: keep README updates focused

[LauraGPT]

Summary

• replace the 45-48 item release timelines in all four top-level READMEs with four adoption-focused highlights
• keep the current PyPI release, MOSS integration, llama.cpp deployment matrix, and realtime serving improvements visible
• route the complete patch history to GitHub Releases and add a test that caps the section at five items

Verification

• python -m pytest -q tests/test_docs_funasr_install_commands.py tests/test_markdown_relative_links.py tests/test_readme_deployment_hub_links.py tests/test_moss_transcribe_diarize_docs.py (27 passed)
• git diff --check

The update is intentionally editorial: it changes no runtime behavior and removes no release artifacts or detailed deployment documentation.