Improve OT ICS containment safety evidence

[DENGXUELIN]

/claim #1643

Summary

• Adds OT/ICS safety and operations evidence gates to containment.
• Requires asset dependency mapping, process state, safety/operator visibility, operations approval, manual fallback, preserve/block flow matrix, evidence continuity, and post-containment validation.
• Adds skill-local JSON fixtures for unsafe abrupt OT isolation and a safe staged containment plan with operations approval.

Validation

• git diff --cached --check
• git diff --check origin/main...HEAD
• Parsed both JSON fixtures with ConvertFrom-Json
• Verified Markdown fence balance
• Verified OTICS-SAFE-01 through OTICS-SAFE-08 markers
• Added-line sensitive-pattern scan
• git merge-tree --write-tree origin/main HEAD matched HEAD^{tree}