Update Paraformer release notes in readmes

Merge pull request #20 from tangsipeng/pr/asr-routing-font-hardening

Fix custom_openai validation and escape subtitle fontsdir

Ignore local Codex state file

Document custom OpenAI and Paraformer setup

Add custom OpenAI provider and configurable LLM settings

Fix Paraformer and local subtitle e2e regressions

Add Paraformer extra and setup docs

Add local ASR routing and font hardening

Add subtitle style previewer and translation hardening

Bump version to 0.4.9

Update changelog for recent Streamlit PRs

Merge pull request #17 from xenoamess-fork/fix-allow-cancel-pending-request-when-restart

Document clip boundary refinement defaults

Add gap-aware boundary normalization reasons