Create a new annotations service, should be async and work by GUID. The new annotations are stored in a simple table that stores all annos for a GUID in a single field. This field has some machine-readable format to store tuples like type:name:value,type:name:value. It should support only int32, double, string formats (no int64, no binaries for now). when querying for a page/bookmark we also join annos on the guid and return them on the result node as a property bag. If we will ever need things like getAllPagesWithAnno() (uses are rare) we may use an FTS index or grow an indexing table for that or try a plain LIKE.