docs: fix options.seed duplicate and add missing options.copy tags in random/iter

[Planeshifter]

Description

What is the purpose of this pull request?

This pull request:

• Aligns three outlier packages in random/iter with majority JSDoc conventions observed across the 41 non-autogenerated siblings.
• random/iter/bernoulli: removes a duplicate @param {*} [options.seed] tag (97.6% of siblings carry a single {PRNGSeedMT19937} entry).
• random/iter/betaprime, random/iter/binomial: add the missing @param {boolean} [options.copy=true] tag between options.state and options.iter (95.1% of siblings document it; option is already implemented, tested, and documented in README/repl/TS).

No runtime, signature, or test changes.

Related Issues

Does this pull request have any related issues?

No.

Questions

Any questions for reviewers of this pull request?

No.

Other

Any other information relevant to this pull request?

Produced by an automated cross-package drift-detection pass over random/iter (random namespace pick, seed 20260418). Three agents independently confirmed confirmed-drift for each finding. Excluded: packages with a ## References section (cite source papers); packages missing options.prng (PRNG engines/selectors); features without a ≥75% majority.

Checklist

Please ensure the following tasks are completed before submitting this pull request.

• Read, understood, and followed the contributing guidelines.

AI Assistance

When authoring the changes proposed in this PR, did you use any kind of AI assistance?

• Yes
• No

If you answered "yes" above, how did you use AI assistance?

• Code generation (e.g., when writing an implementation or fixing a bug)
• Test/benchmark generation
• Documentation (including examples)
• Research and understanding

Disclosure

This PR was authored by Claude Code running a cross-package drift-detection routine.

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[stdlib-bot]

Coverage Report

Package	Statements	Branches	Functions	Lines
random/iter/bernoulli	$\color{green}295/295$ $\color{green}+100.00%$	$\color{green}33/33$ $\color{green}+100.00%$	$\color{green}10/10$ $\color{green}+100.00%$	$\color{green}295/295$ $\color{green}+100.00%$
random/iter/betaprime	$\color{green}300/300$ $\color{green}+100.00%$	$\color{green}35/35$ $\color{green}+100.00%$	$\color{green}10/10$ $\color{green}+100.00%$	$\color{green}300/300$ $\color{green}+100.00%$
random/iter/binomial	$\color{green}301/301$ $\color{green}+100.00%$	$\color{green}35/35$ $\color{green}+100.00%$	$\color{green}10/10$ $\color{green}+100.00%$	$\color{green}301/301$ $\color{green}+100.00%$

The above coverage report was generated for the changes in this PR.