feat: projections auto create their tables (#3324)

* begin init checks for projections

* first projection checks

* debug notification providers with query fixes

* more projections and first index

* more projections

* more projections

* finish projections

* fix tests (remove db name)

* create tables in setup

* fix logging / error handling

* add tenant to views

* rename tenant to instance_id

* add instance_id to all projections

* add instance_id to all queries

* correct instance_id on projections

* add instance_id to failed_events

* use separate context for instance

* implement features projection

* implement features projection

* remove unique constraint from setup when migration failed

* add error to failed setup event

* add instance_id to primary keys

* fix IAM projection

* remove old migrations folder

* fix keysFromYAML test

internal/eventstore/handler/init.go

@@ -0,0 +1,14 @@
+package handler
+
+import "context"
+
+//Init initializes the projection with the given check
+type Init func(context.Context, *Check) error
+
+type Check struct {
+	Executes []func(ex Executer, projectionName string) (bool, error)
+}
+
+func (c *Check) IsNoop() bool {
+	return len(c.Executes) == 0
+}