Metadata: Add Object Filter API For All Queries

To filter the metadata there are several filter operations that can be applied to the returned list of metadata. The format of the filter itself should be straight-forward and should follow the pattern `property:operator:value`, where property is the property on the metadata you want to filter on, operator is the comparison operator you want to perform and value is the value to check against (not all operators require value). Please see the schema documentation for each type of obejct to discover which properties are available. Recursive filtering, ie. filtering on associated objects or collection of objects, should be supported as well.

Start by reviewing the schema documentation for each object type and identify the metadata query entry points; the issue names no files or tests. Define the supported property:operator:value format, including operators without values, and determine how recursive filtering across associated or collection objects should work. Done means all queries support the documented filter behavior.

Written by the indexing model from the issue text.