fix: honour status param on project and milestone creation

create_project and create_milestone hardcoded status="active" and
ignored any value passed by the MCP or API callers. Route, service,
and model construction now all thread the status field through.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

src/fabledassistant/services/projects.py

@@ -17,6 +17,7 @@ async def create_project(
     description: str = "",
     goal: str = "",
     color: str | None = None,
+    status: str = "active",
 ) -> Project:
     async with async_session() as session:
         project = Project(
@@ -25,7 +26,7 @@ async def create_project(
             description=description,
             goal=goal,
             color=color,
-            status="active",
+            status=status,
         )
         session.add(project)
         await session.commit()