fix: resolve deno lint no-unused-vars errors (lint-clean 0% → 100%)

[Copilot]

deno lint src/ was failing with 3 no-unused-vars errors, driving the praxis lint-clean dimension to 0%.

Changes

• src/semantic.js — two unused destructured variables renamed with _ prefix:
  • prefix → _prefix (options destructure, default never consumed)
  • id → _id (Map iterator key, only entry used in loop body)
• src/rules/retention-policy.js — ageEnforcementRule.impl first param state → _state, matching the convention already used in quotaEnforcementRule in the same file

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[Copilot]

Pull request overview

This PR targets Deno lint compliance by eliminating no-unused-vars findings that were causing the praxis lint-clean dimension to fail.

Changes:

• Update src/semantic.js to prefix intentionally-unused bindings with _ in destructuring/iteration.
• Update src/rules/retention-policy.js to rename an unused rule impl parameter to _state, consistent with nearby rules.

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 2 comments.

File	Description
src/semantic.js	Silences unused-var lint by renaming unused destructured/iterated bindings.
src/rules/retention-policy.js	Renames unused impl parameter to _state to satisfy lint and match existing style.

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[Copilot]

options.prefix is still documented as a supported option (key prefix for chronicle nodes), but the function never uses it—now it’s explicitly aliased to _prefix. This makes the public API misleading and prevents scoping indexing/tracing to a specific key namespace. Either apply the prefix when reading from db.list() (e.g., filter by record key/prefix) or remove the prefix option from the API/docs.

[Copilot]

The loop over vectors only uses the value; declaring _id suggests the key might matter. Consider using array elision for the unused Map key to make the intent clearer and avoid carrying an always-unused binding.

Suggested change

	for (const [_id, entry] of vectors) {
	for (const [, entry] of vectors) {

[kayodebristol]

Auto-approved: CI green + Copilot code review complete.