agent-platform release v4.45.0

The Qwen3 small presets qwen3-4b-instruct, qwen3-8b-fp8 and qwen3-14b (giantswarm/agent-platform#591). They pinned 2025 checkpoints whose successors are smaller or stronger under the same licence and are replaced by the 24 GB line-up above (qwen3-5-4b for the 4B, qwen3-5-9b-fp8 or gemma-4-12b for the 8B, gpt-oss-20b or gemma-4-12b for the 14B — which, at 28 GiB of BF16 weights, never fit a 24 GB card and was tuned for a 128 GB node). The upgrade removes their ConfigMaps; a model already served from one keeps serving (the LLMInferenceService is model-manager’s object), and an installation that wants one back carries its file under modelServing.presets (UPGRADE.md).