feat: add Gladia realtime STT adapter (#2115)

* feat: add Gladia realtime STT adapter

Co-Authored-By: yujonglee <[email protected]>

* fix: implement Gladia two-step initialization flow

- Add build_ws_url_with_api_key method to RealtimeSttAdapter trait
- Use ureq for blocking POST request to get session token
- Fix language_config format to use object with languages array
- Return None for build_auth_header since token is in URL

Co-Authored-By: yujonglee <[email protected]>

* fix: correct ureq dependency ordering in Cargo.toml

Co-Authored-By: yujonglee <[email protected]>

* fix: address review comments - preserve port in URLs and fix channel_index

Co-Authored-By: yujonglee <[email protected]>

* fix: use session registry for channel count in TerminalResponse and transcripts

Co-Authored-By: yujonglee <[email protected]>

---------

Co-authored-by: Devin AI <158243242+devin-ai-integration[bot]@users.noreply.github.com>

Author: yujonglee

Cargo.lock

@@ -15,6 +15,7 @@ futures-util = { workspace = true }
 reqwest = { workspace = true, features = ["json", "multipart"] }
 tokio = { workspace = true }
 tokio-stream = { workspace = true }
+ureq = { version = "2", features = ["json"] }
 
 bytes = { workspace = true }
 serde = { workspace = true }