feat: document the category of every entry

Held entries carry their category and readers too, not only missing ones, so each platform page says which cores read every file it lists and where the code does it. Severity still applies to firmware gaps only.

scripts/generate_site.py

@@ -1993,14 +1993,14 @@ def _render_platform_systems(
                 status_display = f"untested: {reason}" if reason else "untested"
             elif status == "missing":
                 status_display = "**missing**"
-                # Not every missing entry is firmware: the platform may list a
-                # game's data or a file no core it runs opens.
-                kind = {"game_data": "game data",
-                        "unread": "no core the platform runs opens it"}.get(f.get("category", ""))
-                if kind:
-                    status_display += f", {kind}"
             else:
                 status_display = status
+            # Not every entry is firmware: the platform may list a game's data
+            # or a file no core it runs opens.
+            kind = {"game_data": "game data",
+                    "unread": "no core the platform runs opens it"}.get(f.get("category", ""))
+            if kind:
+                status_display += f", {kind}"
 
             size_str = _fmt_size(size) if size else ""
             details = [status_display]
@@ -2033,7 +2033,7 @@ def _render_platform_systems(
                 if sha256:
                     hash_parts.append(f"SHA256: `{sha256}`")
                 lines.append(f"{pad}    {' | '.join(hash_parts)}")
-            if status == "missing" and f.get("category_evidence"):
+            if f.get("category_evidence"):
                 lines.append(f"{pad}    {_category_evidence_md(f['category_evidence'])}")
 
         lines.append("")