docs: regenerate catalogs and graphs for the projection seam; classify its types

gen-cordis-catalog type-link rows for the ProjectionDefinition surface and
CommandExecution; a sessionProjections service-role row for gen-doc-graphs;
regenerated module graph, persistence/config/cordis catalogs and api-catalog;
packages/README rows condensed back under the word ceiling; the RFC's sketch
fences marked ignore-check on both language sides (pairing re-recorded).

scripts/gen-cordis-catalog.ts

@@ -233,6 +233,11 @@ const TYPE_LINK_EXEMPTIONS: Readonly<Record<string, string>> = {
   DomainSpec: 'domain declaration contract is owned by packages/storage/storage-domain/README.md',
   StorageBackend: 'backend contract is owned by packages/storage/storage/src/backend.ts',
   StorageForms: 'merge-extensible form map is owned by packages/storage/storage/src/index.ts',
+  ProjectionDefinition: 'projection unit contract is owned by packages/session-projection/session-projection/README.md',
+  SessionProjectionMap: 'merge-extensible projection key map is owned by packages/session-projection/session-projection/src/types.ts',
+  ProjectionChangeListener: 'change-feed listener contract is owned by packages/session-projection/session-projection/src/index.ts',
+  ProjectionSnapshot: 'watermark snapshot shape is owned by packages/session-projection/session-projection/src/index.ts',
+  CommandExecution: 'executor return contract is owned by packages/ui/commands/src/index.ts',
   InvariantInstaller: 'service-local contribution contract is owned by packages/support/invariants/README.md',
   LocaleDict: 'service-local dictionary shape is owned by packages/client/i18n/src/index.ts',
   WebBootGraph: 'web boot graph wire shape is owned by packages/client/modules/src/client/index.ts',