fix(gen): resolver registry describes the template language again

Seven registered {{PLACEHOLDER}}s had zero uses in any .tmpl (checked in both
bare and :arg forms): REDACT_TAXONOMY_TABLE, TEST_COVERAGE_AUDIT_REVIEW,
MODEL_OVERLAY, QUESTION_PREFERENCE_CHECK, QUESTION_LOG, INLINE_TUNE_FEEDBACK,
MAKE_PDF_SETUP. The last two of those families are invoked programmatically by
preamble.ts (functions kept, registry entries dropped); the question-tuning
trio and the review coverage-audit wrapper were documented by their own module
as existing 'for unit testing' that no test performed — deleted, along with
generateRedactTaxonomyTable + its EXAMPLE/TIER_BLURB constants (its '/cso
renders the full table' comment was itself stale) and its test describe.

Also deletes the gated-resolver mechanism (ResolverEntry/appliesTo/
unwrapResolver + test/resolver-entry.test.ts): fully built, fully tested,
used by zero of the 65 registry entries — the generator loop simplifies to a
direct function call. CLAUDE.md's redact-doc line stops advertising the dead
token.

Proof: zero-diff regen (0 SKILL.md changed); gen-skill-docs + skill-validation
737 tests green.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

test/redact-doc-resolver.test.ts

@@ -7,7 +7,6 @@
  */
 import { describe, test, expect } from "bun:test";
 import {
-  generateRedactTaxonomyTable,
   generateRedactInvocationBlock,
 } from "../scripts/resolvers/redact-doc";
 import { HOST_PATHS } from "../scripts/resolvers/types";
@@ -20,32 +19,6 @@ const ctx = {
   paths: HOST_PATHS["claude"],
 };
 
-describe("REDACT_TAXONOMY_TABLE", () => {
-  const table = generateRedactTaxonomyTable(ctx);
-
-  test("lists every pattern id from the engine (no drift)", () => {
-    for (const p of PATTERNS) {
-      expect(table).toContain(`\`${p.id}\``);
-    }
-  });
-
-  test("contains the recognizable credential prefixes", () => {
-    for (const s of ["AKIA", "ghp_", "sk-ant-", "sk-", "BEGIN"]) {
-      expect(table).toContain(s);
-    }
-  });
-
-  test("has all three tier sections", () => {
-    expect(table).toContain("HIGH — genuinely-secret");
-    expect(table).toContain("MEDIUM — PII");
-    expect(table).toContain("LOW — surfaced");
-  });
-
-  test("documents the calibration rationale (publishable/AIza/JWT are MEDIUM)", () => {
-    expect(table).toMatch(/cries wolf/);
-    expect(table).toContain("pk_live_");
-  });
-});
 
 describe("REDACT_INVOCATION_BLOCK", () => {
   test("scan-at-sink: temp file → scan that file → exact bytes", () => {