fix: Handle association document versions 0.6.0 and 0.7.0 in guidelines store

The association schema hasn't changed since 0.5.0, but the document
loader needs to handle the newer version strings.

Signed-off-by: Laurits Søgaard Nielsen <lsn@werktoej.dk>

Author: lauritssn

src/parlant/core/guidelines.py

@@ -379,6 +379,10 @@ async def _association_document_loader(
         if doc["version"] == "0.5.0":
             return cast(GuidelineTagAssociationDocument, doc)
 
+        # Handle versions 0.6.0+ - the association schema hasn't changed
+        if doc["version"] in ("0.6.0", "0.7.0"):
+            return cast(GuidelineTagAssociationDocument, doc)
+
         return None
 
     async def __aenter__(self) -> Self: