Improve recursive path enumeration performance

[Kire (kireadmin)]

Summary

• Use lazy directory enumeration in the recursive path walker to avoid allocating arrays of every file and subdirectory before traversal.
• Preserve traversal order and existing path filtering/analysis behavior.

Validation

• git diff --check passed.
• Build/test execution is blocked locally: the repository pins .NET SDK 8.0.419 (only 10.0.401 and 11.0 preview are installed), and restore from the configured Azure Artifacts feed returned 401.

[Copilot]

🟢 Approval recommended

The focused API substitutions preserve existing behavior while reducing intermediate allocations.

0 open findings

What changed in this PR

Improves recursive script-path discovery by lazily enumerating directory contents.

Changes:

• Replaces eager file and directory array allocation with enumeration.
• Preserves existing traversal and filtering logic.

File	Description
Engine/​ScriptAnalyzer.cs	Uses lazy filesystem enumeration during path traversal.

🧠 Review effort: Balanced

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