v1.30.0: rename theta-env -> theta-suite + docs rewrite + sso v1.16.1 (#126)

Rename the project to theta-suite (it is now an integrated suite of four
apps around a shared OpenBao secrets store, not a two-project env).
- theta-env -> theta-suite across the superproject: _config.yml (title +
  baseurl /theta-suite + repo URLs), README, setup.sh (incl. the
  THETA_SUITE_REEXECED self-update sentinel), docker-compose.yml,
  bootstrap.js, lint.yml, config.example/*, docs/robots.txt, all docs,
  this changelog.
- architecture.md rewritten: real 4-service + ldap-client topology, OpenBao
  secrets section, OpenBao-aware config flow; removed "two containers" /
  "three repos" / LDAP-"legacy" framing.
- index.md: integrated-suite framing + secrets/OpenBao + ldap-client.
- standalone.md + README: standalone reframed as advanced opt-in.
- sso-manager-node submodule -> v1.16.1 (401 fix on /conf and /vault).

Co-authored-by: Claude <noreply@anthropic.com>

test-integration.sh

@@ -1,7 +1,7 @@
 #!/bin/bash
 set -e
 
-echo "=== Starting theta-env Integration Tests ==="
+echo "=== Starting theta-suite Integration Tests ==="
 
 echo "=> Cleaning up any existing containers and volumes..."
 docker-compose down -v
@@ -11,7 +11,7 @@ echo "=> Running setup.sh to initialize environment..."
 # setup.sh uses dialog, which requires a terminal, but it falls back to defaults if not interactive?
 # Actually setup.sh has a dialog UI. Let's just run it or provide a seeded config.
 # If setup.sh is strictly interactive, we might need to bypass it or provide answers.
-# Let's try running docker-compose up directly if setup.sh is too interactive, but the user explicitly said "Make sure setup.sh like your change, then do a full release. Make sure each repo has a current change log, is pushed and and merged." and "Automated testing in theta-env to test integration between all the include projects".
+# Let's try running docker-compose up directly if setup.sh is too interactive, but the user explicitly said "Make sure setup.sh like your change, then do a full release. Make sure each repo has a current change log, is pushed and and merged." and "Automated testing in theta-suite to test integration between all the include projects".
 
 # Wait, setup.sh has no silent mode out of the box unless we provide answers.
 echo "=> Initializing OpenBao manually for tests (simulating setup.sh)"