Batch Conpherence access to markup cache

Summary: Bulk process markup instead of doing them one at a time. Fixes T2504.

Test Plan: Viewed service profile, saw a single call for all the cache entries.

Reviewers: btrahan

Reviewed By: btrahan

CC: aran

Maniphest Tasks: T2504

Differential Revision: https://secure.phabricator.com/D4844