fix(packages): correct pname typo, add missing category, add sed warning, fix indent

- graphify: fix pname typo graphifyy -> graphify
- container-use: add missing passthru.category
- radar: add brittleness warning on postPatch sed block
- freebuff: fix extractNpmPkg indentation

packages/radar/package.nix

@@ -25,6 +25,9 @@ let
 
     postPatch = ''
       # Fix missing resolved URLs for packages under web/node_modules/
+      # WARNING: This sed is version-specific — if upstream bumps a
+      # transitive dep version, the patterns silently fail and the
+      # build breaks. Update resolved/integrity values when bumping radar.
       # that are actually external npm packages (not workspace links).
       # Insert "resolved" and "integrity" after the "version" field
       # for each affected package using sed.