fix(showcase): name the generators, since C# and Python no longer have a default suite

`regen-showcase.ts` invoked the C# and Python CLIs with no `--generators`. ADR-0034
Amendment 2 made codegen opt-in on both, so a run that names none generates
nothing and exits 2 — `gen: no generators selected`. The Python arm failed exactly
that way in the 1.0.4 release dry run.

It reached a cut rather than a lane because this script is the only caller of those
two CLIs outside their own tests, and `--check` runs in the release preflight, not
in CI. The opt-in change and the caller that assumed a default shipped in the same
release window and nothing sat between them.

The two suites are spelled out with the reason, not defaulted back in. They are
exactly the generators whose output is committed under
`examples/showcase/generated/<port>/`, which is verifiable rather than asserted:
`--check --all-ports` regenerates PRISTINE and reports the committed tree FRESH on
all five ports, so these sets reproduce what is already there byte for byte. The
ports' own test suites spell the same lists for the same reason
(`server/python/tests/codegen/gen_suite.py`,
`server/csharp/MetaObjects.Cli.Tests/GenSuiteForTests.cs`).

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_011cQxyVuTkdPmAduLiedNEg

Author: dmealing

scripts/regen-showcase.ts

@@ -130,6 +130,7 @@ const PORTS: Port[] = [
         "uv", "run", "--project", resolve(REPO, "server/python"),
         "metaobjects", "gen", join(project, "metaobjects"),
         "--out", join(project, "generated", "python"),
+        "--generators", PYTHON_SUITE,
       ]),
   },
   {
@@ -145,6 +146,7 @@ const PORTS: Port[] = [
         "-v", "q", "--",
         "gen", join(project, "metaobjects"),
         "--out", join(project, "generated", "csharp"),
+        "--generators", CSHARP_SUITE,
       ]),
   },
   {
@@ -199,6 +201,25 @@ const PORTS: Port[] = [
   },
 ];
 
+/**
+ * The generators whose output is COMMITTED under `examples/showcase/generated/<port>/`.
+ *
+ * Spelled out because ADR-0034 Amendment 2 removed the default suite: `--generators` is
+ * required on the C# and Python CLIs, and a run that names none generates nothing and
+ * exits 2. This script is the only caller of those two CLIs outside their own tests, and
+ * it runs ONLY at a release cut (`regen-showcase --check`), which is why the omission
+ * reached a cut rather than a lane — it surfaced as `gen: no generators selected` in the
+ * 1.0.4 dry run.
+ *
+ * These sets are not a default by the back door. They are exactly the generators that
+ * produce the files committed here, so changing one means the committed tree changes too
+ * — which is the diff this gate exists to show. The ports' own test suites spell the same
+ * lists for the same reason (`server/python/tests/codegen/gen_suite.py`,
+ * `server/csharp/MetaObjects.Cli.Tests/GenSuiteForTests.cs`).
+ */
+const PYTHON_SUITE = "entity,routes,filter-allowlist,names,payload,output-parser,output-prompt,extractor";
+const CSHARP_SUITE = "entity,names,db-context,routes,filter-allowlist,payload,output-parser,output-prompt,extractor";
+
 function selectPorts(): Port[] {
   if (BUN_ONLY) {
     for (const p of PORTS.filter((p) => p.tool)) {