feat(about): wire bio portraits, swap images, circular frame, widen pull-quote

Portraits (1365 square) rendered as circles via border-radius:50%; parallax
tamed to fit. Process figure swapped to dd-mixer-2; Home Our Origin split
swapped to dd-pedals. Pull-quote widened 22ch to 44ch.

DeepDrftPublic.Client/Pages/About.razor.css

@@ -272,16 +272,17 @@
 
 .bio-portrait {
     width: 100%;
+    aspect-ratio: 1 / 1;
     overflow: hidden;
     border: 1px solid var(--deepdrft-border);
+    border-radius: 50%;
 }
 
 /* Graceful-degrade slot shown until a portrait file lands. A flat tonal panel in
-   the navy family with the site's portrait aspect precedent (1365×2048). */
+   the navy family, matching the circular portrait frame. */
 .bio-portrait-placeholder {
     width: 100%;
-    aspect-ratio: 1365 / 2048;
-    max-height: 56vh;
+    aspect-ratio: 1 / 1;
     background:
         linear-gradient(160deg,
             color-mix(in srgb, var(--deepdrft-navy) 8%, var(--deepdrft-white)) 0%,
@@ -480,7 +481,7 @@
 .pull-quote {
     margin: 0;
     margin-left: -7rem;
-    max-width: 22ch;
+    max-width: 44ch;
 }
 
 .pull-eyebrow {