agent-platform release v4.48.1

Fixed

• model-serving: gemma-4-31b serves 32k context and qwen3-6-35b-a3b 16k on the 48 GB card — the 64k the first shipped with needs 12 GiB of KV cache next to 31.7 GiB of weights and vLLM refused to start (estimated maximum model length is 8624); the fit check passed it (giantswarm/model-manager#149) (#591).