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-doc-graphs.ts

@@ -236,6 +236,14 @@ const SERVICE_ROLES: ServiceRole[] = [
     consumers: ['tui'],
     note: 'Plugins register direct human commands; TUI consumes the effective per-agent catalog without sending invocations to the model.',
   },
+  {
+    key: 'sessionProjections',
+    pkg: 'session-projection',
+    title: 'Session projection units',
+    mode: 'core',
+    consumers: ['tool-todo', 'session-title', 'host-apiproxy'],
+    note: 'Domains register state-driven fold units; the eager drive keeps per-session watermark states and api-proxy serves baselines and pushes changed values.',
+  },
   {
     key: 'tui',
     pkg: 'tui',