fix(fable-mcp): fix streaming error handling and bump timeout for SSE

- stream_get now reads error responses before calling _raise_for_status
  (httpx raises on .json()/.text access inside an unread stream context)
- Raise read timeout to 120s (was 30s) so generation streams don't timeout
- Document "generation" as a valid category for fable_get_app_logs

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

fable-mcp/pyproject.toml

@@ -4,7 +4,7 @@ build-backend = "hatchling.build"
 
 [project]
 name = "fable-mcp"
-version = "0.2.0"
+version = "0.2.1"
 description = "MCP server for Fabled Assistant"
 requires-python = ">=3.12"
 dependencies = [