inscription-viewer: drop chisel.xyz lore from user-facing strings

Tooltip + code comment for tag 15 (note) had narrative about chisel.xyz
writing their URL into the field. Out of scope for the UI -- users don't
need the protocol-research backstory. Tightened to a plain technical
description: 'free-form note attached to the inscription; reference
indexer stores but does not display'.

Author: hans-crypto

frontend/src/app/components/_ordpool/digital-artifact-viewer/inscription-viewer/inscription-viewer.component.html

@@ -103,7 +103,7 @@
       Note (tag 15):
       <code class="smaller-text">{{ note }}</code>
       <fa-icon class="ml-1 smaller-text" [icon]="['fas', 'info-circle']" [fixedWidth]="true"
-        ngbTooltip="Tag::Note in ord (PR #3256). Stored but not displayed by the reference indexer. chisel.xyz uses it for an inscriber-tool watermark URL."
+        ngbTooltip="Tag 15 (Tag::Note in ord). Free-form note attached to the inscription. The reference indexer stores it but does not display it."
       ></fa-icon>
     </div>
 

frontend/src/app/components/_ordpool/digital-artifact-viewer/inscription-viewer/inscription-viewer.component.ts

@@ -44,9 +44,9 @@ export class InscriptionViewerComponent {
     reason?: DecodeFailureReason,
   }> | undefined;
 
-  // Tag 15 (note): chisel.xyz-style inscriber-tool watermark string. ord stores
-  // but doesn't display it; we surface it so explorers can flag inscriber
-  // attribution.
+  // Tag 15 (note): free-form string attached to the inscription. The
+  // reference indexer stores it but doesn't display it; we surface it on
+  // the detail page.
   note: string | undefined;
 
   // Tag 13 (rune commitment): little-endian bytes of a rune's u128 value.