fix(stdlib): collections.affine prelude arg-order + let mut (#128)

[hyperpolymath]

collections.affine imported filter/map/range/any from prelude but called filter/map pred-first while prelude is list-first (arr, pred) → Unify (Array, (_->Bool)); and re-imported any/range which it also defines locally with a (pred, list) signature.

• import only Option/Some/None/filter/map (local any/range win)

• flip filter/map call sites to prelude list-first order (inner local any kept pred-first)

• reassigned accumulators → let mut

• stdlib 17 → 18/19 — only option.affine remains

• dune test 233/233, zero regression

Refs #128

[github-actions]

🔍 Hypatia Security Scan

Findings: 44 issues detected

Severity	Count
🔴 Critical	12
🟠 High	21
🟡 Medium	11

⚠️ Action Required: Critical security issues found!

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