v0.15.2

What's Changed

• fix(authentication): auth middleware excluded paths by @ChrisPdgn in #405
• fix(database): failing $exists and nullity queries in postgres by @kkopanidis in #409
• refactor(grpc-sdk,hermes,admin,router): hermes route proto generation by @kon14 in #408
• feat(push-notifications): one signal provider by @SotiriaSte in #406

Full Changelog: v0.15.1...v0.15.2