Consider deprecating old parsers API

**Description**
Currently handlers lacks proper retry support.

**Proposed solution**
Add configurable retry with sensible defaults.

**Priority**: Low/Medium

Start by locating the handlers and the old parsers API referenced in the issue, then trace how handler failures are currently processed. Clarify whether the requested work is parser API deprecation or configurable handler retries before implementation. Done means the intended API direction is resolved and retry behavior has configurable sensible defaults.

Written by the indexing model from the issue text.