Adds a controller, service (which could probably be made more generic and share with pointinpolygon), and predicates for determining when placeholder should be called.
This also renames `is_pip_service_enabled.js` to `is_service_enabled.js` since it's generic. If placeholder returns a non-empty response then `res.data` is populated, otherwise `res.data` is not populated, allowing fallback to existing production behavior.
- added URI-formatted `api.pipService` config support in schema
- added predicate that determines whether pipService is enabled/disabled
- reworked should-execute conditions for non-coarse reverse
several things are in this commit:
- coarse reverse controller / pip service
- inject "conditional execute" predicate into search service to shortcut execution conditions
- added coarse reverse controller to precede standard reverse controller
- lots of tests!