fix(chatwoot): keep contact when Chatwoot update fails

[wahyuwidgetworks]

Context

Group conversations were dropped when Chatwoot contact updates (name/avatar) failed, because updateContact returned null and createConversation treated the contact as missing.

Changes

• [WIDGET-WORKS] Log updateContact errors for visibility.
• [WIDGET-WORKS] In createConversation, keep the existing contact when updateContact fails instead of nulling it, so group conversation creation proceeds.
• Update CHANGELOG entry under 2.3.2 Widget Works Modification.

Testing

• Not run (requires Chatwoot/WhatsApp integration). Suggested: simulate group message where Chatwoot contact update fails (force avatar_url failure) and verify conversation is still created and logs the fallback warning.