fix(tenancy): use absolute URL in team invitation email link

Email clients need absolute URLs to make links clickable. The
acceptance_link was a relative path (/store/invitation/accept?token=...)
which rendered as plain text. Now prepends the platform domain with
the correct protocol.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

app/modules/prospecting/schemas/score.py

@@ -1,9 +1,10 @@
 # app/modules/prospecting/schemas/score.py
 """Pydantic schemas for opportunity scoring."""
 
+import json
 from datetime import datetime
 
-from pydantic import BaseModel
+from pydantic import BaseModel, field_validator
 
 
 class ProspectScoreResponse(BaseModel):
@@ -23,5 +24,19 @@ class ProspectScoreResponse(BaseModel):
     created_at: datetime
     updated_at: datetime
 
+    @field_validator("reason_flags", mode="before")
+    @classmethod
+    def parse_reason_flags(cls, v):
+        if isinstance(v, str):
+            return json.loads(v)
+        return v
+
+    @field_validator("score_breakdown", mode="before")
+    @classmethod
+    def parse_score_breakdown(cls, v):
+        if isinstance(v, str):
+            return json.loads(v)
+        return v
+
     class Config:
         from_attributes = True