Reconcile packaging, bootstrap and migration credential handling

Closes gap G09: five loosely related defects.

lldap-export took the service account password on argv, where ps exposes it to
any local user and shell history and process accounting capture it. It now
prefers KEYCAPE_LLDAP_BIND_PW or --bind-pw-file; --bind-pw still works but warns,
deprecated rather than removed because existing runbooks use it and breaking them
silently would be worse than one more cycle of exposure. Conflicting sources are
rejected instead of silently ranked, since an operator otherwise cannot tell
which bind was attempted. Both migration scripts pass the password by
environment now.

The canonical export, generated LDIF and Keycloak realm were written 0644. None
carries credential material, but the snapshot is every username, display name,
email and group membership in the estate, and it tends to land in /tmp. All three
are 0600.

The image packaged keycape alone, so the validator and migration binaries needed
a Go toolchain on the host -- which defeats shipping an image for the cutover
work they exist to support. All five ship; the issuer stays the entrypoint.
Verified by building the image and running each binary inside it.

The publish workflow named 92.205.130.254:32166 while the cluster runs
forgejo.coulomb.social/coulomb/key-cape. It now defaults to the recorded name and
stays overridable by a repository variable. This repository cannot verify that
the runner resolves that hostname or that the registry credentials are valid for
it; if the next publish fails, set the REGISTRY variable back to the address.

docker-compose.dev.yml mounts a private key and Authelia material that are
correctly absent from the checkout. scripts/bootstrap-dev.sh generates them
locally under a restrictive umask rather than chmodding afterwards, so the key is
never briefly world-readable. Everything it writes is git-ignored.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01NV9oijZukGyGbRQGGKnK4P

Assistant: claude-code
Assistant-Model: opus
Assistant-Process: 713576@bnt-lap001
Assistant-Session: 384c511d-9bce-4cb8-a676-2aef6c0c8df6

SCOPE.md

@@ -26,7 +26,7 @@ Keycloak interchangeability are not established.
 | Tokens and identity | Locally signed RS256 JWTs; configurable access-token resource audience while ID tokens retain the client audience; human/service principal types, tenant, groups, roles, scope and assurance claims. UserInfo resolves canonical directory subjects and filters profile/email/groups by scope. |
 | Caller commands | `keycape login` for public-client browser PKCE login and `keycape service-token` for service exchange. HTTPS discovery/JWKS verification and private JSON token-file delivery outside Git; no token output on stdout. |
 | Validation and migration | Canonical snapshot checks; deterministic LLDAP user/group/membership export that records whether it enumerated the whole directory; basic Keycloak realm JSON; LDIF generation for OpenLDAP, 389 Directory Server and AD targets. These generate artifacts rather than execute a complete migration. |
-| Diagnostics and packaging | Structured authentication/enforcement/migration events, a process health response, Go build/test/vet targets, a container containing the KeyCape binary, and development/CI scaffolding. |
+| Diagnostics and packaging | Structured authentication/enforcement/migration events, liveness and dependency-probing readiness endpoints, Go build/test/vet targets, a container packaging the issuer and all four migration/validation binaries, and development/CI scaffolding. |
 
 ## Material limits
 
@@ -98,7 +98,9 @@ Keycloak interchangeability are not established.
   The supported topology is a single replica, since login and authorization state
   is process-local — see [operations](docs/operations.md) for that and for the
   key-rotation, client-removal and logout limits. Development
-  Compose needs configuration/key material absent from the checkout. Production
+  Compose needs key and Authelia material absent from the checkout by design;
+  `scripts/bootstrap-dev.sh` generates it locally and git-ignores it
+  (KEY-WP-0026). Production
   deployment and custody are external; a source implementation or example client
   fragment does not prove live registration or consumer cutover.
 - Approval-client provisioning, coordinated Qonto rotation, native consumer