feat(reports): add quarterly and technique download routes [FASE-2.4]

Expose GET endpoints for quarterly-summary and technique reports with PDF, DOCX, and HTML formats.

backend/app/routers/professional_reports.py

@@ -70,3 +70,38 @@ def generate_executive_report(
         media_type=_MEDIA_TYPES[format],
         filename=f"executive_summary.{format}",
     )
+
+
+@router.get("/quarterly-summary")
+def generate_quarterly_report(
+    format: str = Query("pdf", pattern="^(pdf|docx|html)$"),
+    db: Session = Depends(get_db),
+    user: User = Depends(require_any_role("red_lead", "blue_lead", "viewer")),
+):
+    """Generate a quarterly security summary report."""
+    filepath = report_generation_service.generate_quarterly_summary(
+        db, output_format=format,
+    )
+    return FileResponse(
+        filepath,
+        media_type=_MEDIA_TYPES[format],
+        filename=f"quarterly_summary.{format}",
+    )
+
+
+@router.get("/technique/{technique_id}")
+def generate_technique_report(
+    technique_id: UUID,
+    format: str = Query("pdf", pattern="^(pdf|docx|html)$"),
+    db: Session = Depends(get_db),
+    user: User = Depends(get_current_user),
+):
+    """Generate a detailed report for one MITRE technique."""
+    filepath = report_generation_service.generate_technique_detail_report(
+        db, str(technique_id), output_format=format,
+    )
+    return FileResponse(
+        filepath,
+        media_type=_MEDIA_TYPES[format],
+        filename=f"technique_{technique_id}.{format}",
+    )