obleth-gateway v0.9.2

Managed-model config catches bad inputs before Slurm does, provisioning-error notices can be dismissed, and a dead replica pool can no longer ride a stale success to "healthy".

• Managed-model settings validate before saving. The Placement and Service fields now check their inputs client-side — time limit format, port range, replica counts, node/CPU numbers — and highlight the offending field with an inline hint, instead of forwarding a malformed value and surfacing an opaque slurmrestd 500. Each field also carries a short format hint.
• Provisioning-error banners are dismissible. When the provisioner rejects a job (bad account / partition / QoS), the model's error banner can now be cleared once you've fixed the cause — it returns on its own if the next launch also fails.
• A model whose replicas have all died no longer reports "healthy". For Slurm-provisioned / dynamic-endpoint models, a recent passive success from the usage ledger could stand in as the health verdict even after every replica behind it went away — a success served just before the pool emptied. The passive shortcut now only settles a pool that still has a live endpoint serving; an empty or fully-dead pool reports its own reality.