add Synthesia logo + ISO TÜV seal assets to repo

references/brand-guide.md

@@ -201,14 +201,14 @@ table:
   cell_padding_pt: [4, 6, 4, 6]  # top, right, bottom, left
 
 logo:
-  file: "corrected full logo crop (hexagon mark + wordmark, nothing cut off) — design/color unchanged"
+  file: "assets/logo-synthesia.png"      # 118×57px, hexagon mark + wordmark
   height_cm: 1.5
   alignment: left
   placement: header, top-left
   aspect_ratio: locked
 
 iso_seal:
-  file: "TÜV Rheinland certified-seal icon only (triangle + wordmark + CERTIFIED banner), cropped from the full badge"
+  file: "assets/iso-seal-tuv-rheinland.png"  # 56×57px, triangle + wordmark + CERTIFIED banner
   height_cm: 1.5
   alignment: right
   placement: header, top-right (same row as logo)
@@ -293,8 +293,8 @@ All headings/body text set in **Calibri**.
 
 ## Notes for the Pipeline Team
 
-- Logo file and its blue are unchanged in design — only the crop was fixed (the earlier version accidentally clipped part of the mark; the corrected asset uses the full, correctly-proportioned logo).
-- ISO badge updated to the current TÜV Rheinland combined-certification mark (ISO 9001:2015 / 14001:2015 / 45001:2018, `www.tuv.com`, ID 9105074744) — swap this one asset whenever certifications renew, without touching anything else.
+- Logo: `assets/logo-synthesia.png` (118×57px) — hexagon mark + wordmark, design/color unchanged from original.
+- ISO seal: `assets/iso-seal-tuv-rheinland.png` (56×57px) — TÜV Rheinland combined-certification mark (ISO 9001:2015 / 14001:2015 / 45001:2018, ID 9105074744) — swap this one asset whenever certifications renew, without touching anything else.
 - Logo and ISO badge are now separate image assets rather than baked into one banner image, specifically so either can be updated independently in the future.
 - All rules/bars are drawn as vector shapes or table borders, not raster images — this removes the blurring/scaling issues in the old letterhead and keeps output crisp at any print DPI.
 - Amber/Red are hard-scoped to GHS hazard content only, so automated hazard-statement rendering never accidentally inherits brand-blue styling meant for headings/tables.