fix(deploy,host): docker-dev bring-up — anon health probes, robust seeder

Two fixes surfaced while bringing up the docker-dev stack end-to-end:

- HealthEndpoints.MapOtOpcUaHealth now calls .AllowAnonymous() on /health/ready,
  /health/active, /healthz. Without it the AddOtOpcUaAuth fallback policy 401s
  every probe and Traefik marks every backend unhealthy → all three cluster
  routes return 503.

- cluster-seed entrypoint no longer attempts to apply Migrate-To-V2.sql via
  sqlcmd. The EF-generated idempotent script puts CREATE PROCEDURE inside
  IF NOT EXISTS BEGIN ... END blocks (procs must be first in their batch),
  so sqlcmd fails with "Must declare the scalar variable @FromGenerationId".
  EF's own runner handles this; sqlcmd doesn't. The seed now just waits for
  the schema and applies row inserts. Migrations remain the operator's job:
      dotnet ef database update --project src/Core/.../Configuration \
                                --startup-project src/Server/.../Host

Also: LDAP service removed (bitnami/openldap:2.6 image retired, legacy tag
crashes mid-setup with exit 68); every host now runs with
Authentication__Ldap__DevStubMode=true. Bumped LDAP+Traefik dashboard host
ports to avoid collisions with the sister scadalink dev stack (3893→3894,
8080→8089).

Confirmed working end-to-end: all three Traefik routes return HTTP 200,
cluster-seed populates ServerCluster (MAIN/SITE-A/SITE-B) + ClusterNode
(driver-a/b, site-a-1/2, site-b-1/2) rows on first boot.

docker-dev/docker-compose.yml

@@ -35,7 +35,7 @@
 #   open http://localhost                  # main cluster Blazor admin UI
 #   open http://site-a.localhost           # site A admin UI
 #   open http://site-b.localhost           # site B admin UI
-#   open http://localhost:8080             # Traefik dashboard
+#   open http://localhost:8089             # Traefik dashboard (8080 is the sister scadalink stack)
 #
 # Tear-down:  docker compose -f docker-dev/docker-compose.yml down -v
 
@@ -71,17 +71,12 @@ services:
     entrypoint: ["/bin/bash", "/seed/entrypoint.sh"]
     restart: "no"
 
-  ldap:
-    image: bitnami/openldap:2.6
-    environment:
-      LDAP_ROOT: "dc=lmxopcua,dc=local"
-      LDAP_ADMIN_USERNAME: "admin"
-      LDAP_ADMIN_PASSWORD: "ldapadmin"
-      LDAP_USERS: "alice,bob"
-      LDAP_PASSWORDS: "alice123,bob123"
-      LDAP_USER_DC: "ou=FleetAdmin"
-    ports:
-      - "3893:1389"
+  # OpenLDAP was previously here but the bitnami/openldap:2.6 image was retired
+  # (manifest gone) and bitnamilegacy/openldap:2.6 crashes during LDIF setup with
+  # exit 68. For the dev compose every host container now runs with
+  # Authentication__Ldap__DevStubMode=true, so any non-empty username/password
+  # signs in as `FleetAdmin`. Restore a real LDAP service when there's a need
+  # for end-to-end LDAP coverage (the host code path is unchanged).
 
   admin-a: &otopcua-host
     build:
@@ -102,9 +97,7 @@ services:
       Security__Jwt__SigningKey: "docker-dev-signing-key-with-at-least-32-bytes-of-utf8-content-12345"
       Security__Jwt__Issuer: "otopcua-dev"
       Security__Jwt__Audience: "otopcua-dev"
-      Authentication__Ldap__Server: "ldap"
-      Authentication__Ldap__Port: "1389"
-      Authentication__Ldap__AllowInsecureLdap: "true"
+      Authentication__Ldap__DevStubMode: "true"
 
   admin-b:
     <<: *otopcua-host
@@ -120,9 +113,7 @@ services:
       Security__Jwt__SigningKey: "docker-dev-signing-key-with-at-least-32-bytes-of-utf8-content-12345"
       Security__Jwt__Issuer: "otopcua-dev"
       Security__Jwt__Audience: "otopcua-dev"
-      Authentication__Ldap__Server: "ldap"
-      Authentication__Ldap__Port: "1389"
-      Authentication__Ldap__AllowInsecureLdap: "true"
+      Authentication__Ldap__DevStubMode: "true"
 
   driver-a:
     <<: *otopcua-host
@@ -170,9 +161,7 @@ services:
       Security__Jwt__SigningKey: "docker-dev-signing-key-with-at-least-32-bytes-of-utf8-content-12345"
       Security__Jwt__Issuer: "otopcua-dev"
       Security__Jwt__Audience: "otopcua-dev"
-      Authentication__Ldap__Server: "ldap"
-      Authentication__Ldap__Port: "1389"
-      Authentication__Ldap__AllowInsecureLdap: "true"
+      Authentication__Ldap__DevStubMode: "true"
     ports:
       - "4842:4840"
 
@@ -194,9 +183,7 @@ services:
       Security__Jwt__SigningKey: "docker-dev-signing-key-with-at-least-32-bytes-of-utf8-content-12345"
       Security__Jwt__Issuer: "otopcua-dev"
       Security__Jwt__Audience: "otopcua-dev"
-      Authentication__Ldap__Server: "ldap"
-      Authentication__Ldap__Port: "1389"
-      Authentication__Ldap__AllowInsecureLdap: "true"
+      Authentication__Ldap__DevStubMode: "true"
     ports:
       - "4843:4840"
 
@@ -217,9 +204,7 @@ services:
       Security__Jwt__SigningKey: "docker-dev-signing-key-with-at-least-32-bytes-of-utf8-content-12345"
       Security__Jwt__Issuer: "otopcua-dev"
       Security__Jwt__Audience: "otopcua-dev"
-      Authentication__Ldap__Server: "ldap"
-      Authentication__Ldap__Port: "1389"
-      Authentication__Ldap__AllowInsecureLdap: "true"
+      Authentication__Ldap__DevStubMode: "true"
     ports:
       - "4844:4840"
 
@@ -241,9 +226,7 @@ services:
       Security__Jwt__SigningKey: "docker-dev-signing-key-with-at-least-32-bytes-of-utf8-content-12345"
       Security__Jwt__Issuer: "otopcua-dev"
       Security__Jwt__Audience: "otopcua-dev"
-      Authentication__Ldap__Server: "ldap"
-      Authentication__Ldap__Port: "1389"
-      Authentication__Ldap__AllowInsecureLdap: "true"
+      Authentication__Ldap__DevStubMode: "true"
     ports:
       - "4845:4840"
 
@@ -256,7 +239,7 @@ services:
       - --api.insecure=true
     ports:
       - "80:80"
-      - "8080:8080"
+      - "8089:8080"  # 8080 conflicts with the sister scadalink dev stack
     volumes:
       - ./traefik-dynamic.yml:/etc/traefik/dynamic.yml:ro
     depends_on: