docs: catalog the code-runtime seam vocabulary (Codex review finding)

Adds the missing core-data-structures coverage the catalog policy
requires for non-spine seam vocabulary: the code-runtime.md sub-page
with drift-checked type-equiv blocks for all six seam types, the core.md
sub-page row, the type-equiv manifest entries, and LINK_MAP entries so
the generated service signature links CodeRunRequest/CodeRunResult;
cordis/config catalogs regenerated.

scripts/gen-cordis-catalog.ts

@@ -97,6 +97,8 @@ export const LINK_MAP: Record<string, string> = {
   BashRunResult: 'bash.md',
   BashTask: 'bash.md',
   BashTaskRead: 'bash.md',
+  CodeRunRequest: 'code-runtime.md',
+  CodeRunResult: 'code-runtime.md',
   FsEditOutcome: 'filesystem.md',
   FsEditRequest: 'filesystem.md',
   FsInfo: 'filesystem.md',