git: merge test, fetch other branch if it's different from target. This prevents potentially missing commits when doing a test merge.

events: properly refresh comment object to load it's relationship. This prevents from issues of reading associated statuses of comment during a partial commit (using Session().flush) - Fixes #5412

pull-requests: add link to switch base based on the target.

docs: update backup/restore for postgres. - use inserts is way more reliable for backup

release: merge back stable branch into default

server-utils: report server ready state

celery: register EE tasks if we have EE enabled

celery: use safer events for execution of tasks

tasks: sync repo will be an EE part of geo sync

tests: increase timeouts for better test stability