fix(eventstore): improve pagination of handler filter (#6968)

* fix(setup): add filter_offset to `projections.current_states`

* fix(eventstore): allow offset in query

* fix(handler): offset for already processed events

internal/eventstore/handler/v2/statement.go

@@ -17,15 +17,26 @@ import (
 
 func (h *Handler) eventsToStatements(tx *sql.Tx, events []eventstore.Event, currentState *state) (statements []*Statement, err error) {
 	statements = make([]*Statement, 0, len(events))
+
+	previousPosition := currentState.position
+	offset := currentState.offset
 	for _, event := range events {
 		statement, err := h.reduce(event)
 		if err != nil {
 			h.logEvent(event).WithError(err).Error("reduce failed")
-			if shouldContinue := h.handleFailedStmt(tx, currentState, failureFromEvent(event, err)); shouldContinue {
+			if shouldContinue := h.handleFailedStmt(tx, failureFromEvent(event, err)); shouldContinue {
 				continue
 			}
 			return statements, err
 		}
+		offset++
+		if previousPosition != event.Position() {
+			// offset is 1 because we want to skip this event
+			offset = 1
+		}
+		statement.offset = offset
+		statement.Position = event.Position()
+		previousPosition = event.Position()
 		statements = append(statements, statement)
 	}
 	return statements, nil
@@ -54,6 +65,8 @@ type Statement struct {
 	CreationDate  time.Time
 	InstanceID    string
 
+	offset uint16
+
 	Execute Exec
 }