fix: pre-commit markdownlint line-length failures in docs

[mvillmow]

Root Cause

Multiple markdown files exceed the 120-character line length limit configured in .

Affected Files

• • Lines 9, 345
• • Lines 5, 788
• • Lines 9, 13, 26, 317, 327
• • Lines 10, 29, 366
• • Line 3
• • Line 3
• • Line 38
• • Lines 13, 607
• • Multiple lines

Also has MD024 (duplicate headings) and MD033 (inline HTML) violations.

Reproduction

cd ProjectKeystone
pre-commit run markdownlint --all-files

Error

markdownlint.............................................................Failed
- hook id: markdownlint
- exit code: 1

docs/PHASE_8_E2E_TESTS.md:9:121 MD013/line-length Line length [Expected: 120; Actual: 130]
...```

## Fix Options

1. **Fix all line lengths** - Wrap long lines in affected markdown files
2. **Disable MD013 for specific lines** - Add `<!-- markdownlint-disable-line -->` comments
3. **Relax line-length limit** - Update  to increase max line length

## Impact

Blocks CI  job from passing.