feat: push telemetry (#6027)

* document analytics config

* rework configuration and docs

* describe HandleActiveInstances better

* describe active instances on quotas better

* only projected events are considered

* cleanup

* describe changes at runtime

* push milestones

* stop tracking events

* calculate and push 4 in 6 milestones

* reduce milestone pushed

* remove docs

* fix scheduled pseudo event projection

* push 5 in 6 milestones

* push 6 in 6 milestones

* ignore client ids

* fix text array contains

* push human readable milestone type

* statement unit tests

* improve dev and db performance

* organize imports

* cleanup

* organize imports

* test projection

* check rows.Err()

* test search query

* pass linting

* review

* test 4 milestones

* simplify milestone by instance ids query

* use type NamespacedCondition

* cleanup

* lint

* lint

* dont overwrite original error

* no opt-in in examples

* cleanup

* prerelease

* enable request headers

* make limit configurable

* review fixes

* only requeue special handlers secondly

* include integration tests

* Revert "include integration tests"

This reverts commit 96db9504ecdb4e73451f09554fd749cd7c27341f.

* pass reducers

* test handlers

* fix unit test

* feat: increment version

* lint

* remove prerelease

* fix integration tests

internal/query/search_query.go

@@ -66,6 +66,27 @@ func (q *NotNullQuery) comp() sq.Sqlizer {
 	return sq.NotEq{q.Column.identifier(): nil}
 }
 
+type IsNullQuery struct {
+	Column Column
+}
+
+func NewIsNullQuery(col Column) (*IsNullQuery, error) {
+	if col.isZero() {
+		return nil, ErrMissingColumn
+	}
+	return &IsNullQuery{
+		Column: col,
+	}, nil
+}
+
+func (q *IsNullQuery) toQuery(query sq.SelectBuilder) sq.SelectBuilder {
+	return query.Where(q.comp())
+}
+
+func (q *IsNullQuery) comp() sq.Sqlizer {
+	return sq.Eq{q.Column.identifier(): nil}
+}
+
 type orQuery struct {
 	queries []SearchQuery
 }