[kimi] Break up _dispatch_via_gitea() into helper functions (#1136) (#1183)

src/timmy/briefing.py

@@ -47,6 +47,7 @@ class ApprovalItem:
 @dataclass
 class Briefing:
     """A generated morning briefing summarizing recent activity and pending approvals."""
+
     generated_at: datetime
     summary: str  # 150-300 words
     approval_items: list[ApprovalItem] = field(default_factory=list)