Feat/environment variables in workflow (#6515)

Co-authored-by: JzoNg <jzongcode@gmail.com>

api/core/app/segments/segment_group.py

@@ -0,0 +1,19 @@
+from pydantic import BaseModel
+
+from .segments import Segment
+
+
+class SegmentGroup(BaseModel):
+    segments: list[Segment]
+
+    @property
+    def text(self):
+        return ''.join([segment.text for segment in self.segments])
+
+    @property
+    def log(self):
+        return ''.join([segment.log for segment in self.segments])
+
+    @property
+    def markdown(self):
+        return ''.join([segment.markdown for segment in self.segments])