feat(backend): extend type unions to accept SaluteSpeechSegment

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

cpv3/modules/transcription/service.py

@@ -28,6 +28,7 @@ from cpv3.modules.transcription.schemas import (
     GoogleSpeechSegment,
     GoogleSpeechWord,
     LineNode,
+    SaluteSpeechSegment,
     SegmentNode,
     Tag,
     TimeRange,
@@ -41,7 +42,9 @@ from cpv3.modules.transcription.schemas import (
 
 class DocumentBuilder:
     def compute_segment_lines(
-        self, segment: WhisperSegment | GoogleSpeechSegment, max_chars_per_line: int
+        self,
+        segment: WhisperSegment | GoogleSpeechSegment | SaluteSpeechSegment,
+        max_chars_per_line: int,
     ) -> list[LineNode]:
         words = segment.words or []
         lines: list[list[WhisperWord | GoogleSpeechWord]] = []
@@ -219,7 +222,7 @@ async def _convert_local_to_ogg(input_path: str) -> tuple[str, Callable[[], None
 
 def _make_document_from_segments(
     builder: DocumentBuilder,
-    segments: list[WhisperSegment] | list[GoogleSpeechSegment],
+    segments: list[WhisperSegment] | list[GoogleSpeechSegment] | list[SaluteSpeechSegment],
     *,
     max_line_width: int,
 ) -> Document: