[plan] Fix SC2086: Add missing quotes in 5 workflows

[github-actions]

Objective

Fix 10 occurrences of shellcheck SC2086 info-level issues across 5 workflows by adding proper quotes around variable references.

Problem

Unquoted variables can lead to unexpected word splitting or pathname expansion:

echo $variable        # ❌ Can split on whitespace, expand globs
command $arg         # ❌ May cause unexpected behavior

Solution

Add double quotes:

echo "$variable"     # ✅ Preserves spaces, prevents expansion
command "$arg"       # ✅ Treats as single argument

Why This Matters

• Prevents word splitting on spaces/tabs/newlines
• Prevents glob expansion (*, ?, etc.)
• Ensures variables are treated as single arguments
• Makes script behavior more predictable

Approach

1. Search for unquoted variable usage: grep -n '\$[A-Za-z_]' .github/workflows/*.md
2. Identify the 10 specific SC2086 violations from actionlint output
3. Add quotes around each variable reference
4. Recompile workflows: make recompile
5. Verify with actionlint

Files to Modify

5 workflow .md files in .github/workflows/ (10 total occurrences)

Acceptance Criteria

• All 10 SC2086 issues resolved
• Variables properly quoted throughout
• actionlint shows 0 SC2086 issues
• No change in intended functionality
  Related to [plan] Address static analysis findings from actionlint/shellcheck #7896

AI generated by Plan Command for discussion #7889