Updated mediawiki/extensions
Project: mediawiki/extensions/EventLogging  65a42bf884619ad57b5337b5ccfa4d4e3d6c71ef
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Establish and implement UUID convention for events

Ideally we'd use such UUIDs as primary keys, but the performance of UUID
PKs in MySQL under write-heavy loads seems to be poor. But at minimum
I'd like to include them as a column, preferably with a unique
constraint.

Also bumps version to 0.5.

Change-Id: I48bc1f861cefcb8a3ff902a156b6877ad6b6e2f4