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When a QC uploaded the XDAL 600 report, the CoC PDF render pipeline now appends the Fischerscope PDF directly after the cert pages. This matches what aerospace / Nadcap auditors expect (and how Steelhead ships certs today) — a single PDF file carrying both the certificate declaration and the raw equipment report. Flow: * _fp_generate_cert_pdf renders the CoC via QWeb as before * _fp_merge_thickness_into_cert resolves the QC for the MO (preferring the passed one) and extracts its thickness_report_pdf_id bytes * PyPDF2.PdfMerger concatenates CoC then Fischerscope into a single PDF * Merged bytes replace pdf_content before the ir.attachment is written * Falls back to CoC-only (and logs a warning) if PyPDF2 is missing or either PDF fails to parse — never blocks MO completion Smoke test: synthetic Fischerscope + real QWeb CoC → 2-page merged PDF with page 1 CoC text and page 2 Fischerscope text, verified via PyPDF2 extract_text. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>