feat(schemas): add scout_proposal + scout_proposal_ack WS frame types

app/schemas/__init__.py

@@ -98,6 +98,9 @@ class WsFrameType(str, Enum):
     contextual_request = "contextual_request"
     contextual_scope_update = "contextual_scope_update"
     contextual_scope_ack = "contextual_scope_ack"
+    # ── v9 scout proposal frame types ────────────────────────────────
+    SCOUT_PROPOSAL = "scout_proposal"
+    SCOUT_PROPOSAL_ACK = "scout_proposal_ack"
 
 
 class WsToolCall(BaseModel):
@@ -275,3 +278,25 @@ class ScoutRunLogResponse(BaseModel):
 
 # ── Chatbot Journey ───────────────────────────────────────────────────
 
+
+# ── Scout Proposal Frame Models ───────────────────────────────────────
+
+class ScoutProposalPayload(BaseModel):
+    id: str
+    scout_id: str
+    source_type: str
+    source_msg_ref: str
+    raw_subject: str | None = None
+    raw_snippet: str | None = None
+    category: Literal["unprocessed"] = "unprocessed"
+    payload: dict | None = None
+
+
+class ScoutProposalFrame(BaseModel):
+    type: Literal[WsFrameType.SCOUT_PROPOSAL]
+    proposal: ScoutProposalPayload
+
+
+class ScoutProposalAckFrame(BaseModel):
+    type: Literal[WsFrameType.SCOUT_PROPOSAL_ACK]
+    proposal_id: str