bump to 0.9.8; add padded-canary build (app_version_padding_tests)

Canary re-proven on this base: reconstruct-from-components trips the
fixture checks; an unpadded fixture trips the non-vacuity assertion.
De-literalizes stale version examples in comments.

src/bank_panel.cpp

@@ -740,9 +740,10 @@ void drawFooter(LICE_IBitmap* bmp, int w, int h) {
     }
 
     // Version/channel readout (Phase V, V3/V4), right-aligned, unobtrusive. appVersion()
-    // renders "0.9.01" on stable and "0.9.01-beta" on beta so a beta panel self-identifies.
-    // It sits inside the space footer_bar reserves at the right (rightReserve) and clears the
-    // prune button (prune_button::rightInset). Dim, passive identification (V3).
+    // renders the configured version string on stable and that string plus "-beta" on beta,
+    // so a beta panel self-identifies. It sits inside the space footer_bar reserves at the
+    // right (rightReserve) and clears the prune button (prune_button::rightInset). Dim,
+    // passive identification (V3).
     kitText(bmp, KitBox{f.left, f.top, (f.right - f.left) - 8, f.bottom - f.top},
             reasampler::appVersion().c_str(), Font::Micro, Role::TextDim, Align::Right);