IA: Stem typo in client POP subject — normalize before CRM

• Client subject "Proof of payment JD134-JOHANB-35" missing the 7 in JD7134.
• Jaco still matched the deal; CRM must normalize to full stem JD7134-JOHANB-35.
• Rule: When stem digits look truncated/typo'd, search nearby JD7### / GH#### patterns and invoice PDFs before creating a new CRM stem.