#1770 glm: GLM-5.3 (glm-dsa) engine strata-glm with CPU and optional CUDA, …

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…served behind the same server

Adds the second model family: the strata-glm engine (src/glm, include/strata/glm), the container packer and geometry tools, setup/install/validate tools, the server integration (serve/glm), tests, and docs/GLM53.md with the measured port results.

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Issue: Resolves # 

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