Fix stale node RAM and Go version requirements in skill references

[monty-sei]

Summary

• node-operations.md: RAM 64 GB → 256 GB DDR5+, Go 1.21+ → 1.24.x
• seid-cli.md: Go 1.23+ → 1.24.x

Aligns both files with the canonical specs in sei-docs (node/index.mdx).

Closes PLT-363

[cursor]

PR Summary

Low Risk
Low risk because this PR only updates documentation requirements and does not change runtime code paths. The main risk is user confusion if the stated Go/RAM requirements don’t match actual supported versions/hardware needs.

Overview
Updates skill reference docs to reflect current prerequisites: seid-cli.md now requires Go 1.24.x (instead of older Go versions), and node-operations.md increases recommended node resources to 16+ cores and 256 GB DDR5 RAM while also requiring Go 1.24.x (not Go 1.21+).

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