test(#1971): consolidate 48 gsd-tools CLI regression tests into subcommand suites

Fold 48 issue-named gsd-tools CLI regression files into the canonical test file
that owns each subcommand subject (state, roadmap, phase, milestone, audit, config,
router/dispatch, stats, verify, health, etc.), preserving every assertion and its
origin issue number as provenance (block-scoped describe wrappers, 299 subtests
conserved 1:1). No monolithic gsd-tools.test.cjs created — routes into 18 existing
per-subject suites.

Removes 48 tests/ files. Regenerates regression-name allowlist (271->231), ratchets
the file-count allowlist across 6 buckets (audit/milestone/phase/roadmap/state/verify),
and makes 10 relocated allow-test-rule exemptions issue-ref-compliant (ADR-456; prunes
10 stale ids). Repoints one CONTEXT.md symptom ref and ADR-3524's parity-test ref.
lint:ci green.

Part of epic #1969. Closes #1971.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

tests/stats-mvp-display.test.cjs

@@ -24,3 +24,71 @@ describe('stats — MVP mode summary', () => {
     );
   });
 });
+
+
+// ────────────────────────────────────────────────────────────────────────
+// Folded from tests/bug-3150-stats-json-decimal-phase-gaps.test.cjs — consolidation epic #1969 (B2 #1971)
+// ────────────────────────────────────────────────────────────────────────
+{
+  const { describe: __foldDescribe } = require('node:test');
+  __foldDescribe("folded:bug-3150-stats-json-decimal-phase-gaps (consolidation epic #1969 B2 #1971)", () => {
+'use strict';
+
+const { test, describe } = require('node:test');
+const assert = require('node:assert/strict');
+const fs = require('node:fs');
+const path = require('node:path');
+const { createTempProject, cleanup, runGsdTools } = require('./helpers.cjs');
+
+describe('bug #3150: stats.json includes contiguous decimal phases when .10 exists', () => {
+  test('stats json preserves 06.7/06.8/06.9 alongside 06.10', () => {
+    const tmpDir = createTempProject('gsd-bug-3150-');
+    try {
+      fs.writeFileSync(
+        path.join(tmpDir, '.planning', 'ROADMAP.md'),
+        `# Roadmap\n\n### Phase 06.6: P06.6\n**Goal:** G\n\n### Phase 06.7: P06.7\n**Goal:** G\n\n### Phase 06.8: P06.8\n**Goal:** G\n\n### Phase 06.9: P06.9\n**Goal:** G\n\n### Phase 06.10: P06.10\n**Goal:** G\n`
+      );
+
+      const dirs = ['06.6-a', '06.7-b', '06.8-c', '06.9-d', '06.10-e'];
+      for (const dirName of dirs) {
+        const phaseDir = path.join(tmpDir, '.planning', 'phases', dirName);
+        fs.mkdirSync(phaseDir, { recursive: true });
+        fs.writeFileSync(path.join(phaseDir, 'PLAN.md'), '# plan\n');
+        fs.writeFileSync(path.join(phaseDir, 'SUMMARY.md'), '# summary\n');
+      }
+
+      const result = runGsdTools('stats json', tmpDir);
+      assert.ok(result.success, `Command failed: ${result.error}`);
+
+      let output;
+      assert.doesNotThrow(
+        () => {
+          output = JSON.parse(result.output);
+        },
+        `Command output must be valid JSON. Raw output prefix: ${result.output.slice(0, 200)}`
+      );
+      assert.ok(
+        output && typeof output === 'object' && !Array.isArray(output),
+        `Expected object output, got: ${typeof output}`
+      );
+      assert.ok(
+        Array.isArray(output.phases),
+        `Expected output.phases array. Raw output prefix: ${result.output.slice(0, 200)}`
+      );
+      const phaseNumbers = output.phases.map((p) => p.number);
+
+      assert.deepStrictEqual(
+        phaseNumbers,
+        ['06.6', '06.7', '06.8', '06.9', '06.10'],
+        'stats.json must not skip 06.7/06.8/06.9 when 06.10 exists'
+      );
+      assert.equal(output.phases_total, 5);
+      assert.equal(output.total_plans, 5);
+      assert.equal(output.total_summaries, 5);
+    } finally {
+      cleanup(tmpDir);
+    }
+  });
+});
+  });
+}