feat(tok,acr): v5.6 B2 — load-pattern column in token-hotspots

Annotate every ranked TOK hotspot with the load-pattern triple
(loadPattern/survivesCompaction/derivationConfidence):

- hotspotLoadPattern() maps each discovery `type` → a deriveLoadPattern kind.
  Rules reuse activeConfig.rules for precise `scoped` handling; claude-md maps
  by scope. Two new deriveLoadPattern kinds back the rest: `command`
  (on-demand — body loads on /invoke) and `harness-config` (external —
  settings/keybindings/.mcp.json/hooks.json/plugin.json configure the CLI, not
  the model context, so they cost no per-turn context tokens). Honest split:
  the .mcp.json FILE is external; the MCP server's tool schemas are a separate
  `always` hotspot.

Byte-stability — the opposite of B1's manifest. token-hotspots IS a byte-equal
SC-6/SC-7 CLI, and its hotspots ride inside scan-orchestrator + posture, so the
change touched SIX frozen-v5.0.0 comparisons across five test files. Resolved by
preserving the frozen baselines: a shared tests/helpers/strip-hotspot-load-pattern.mjs
strips the additive triple before each byte-equal compare (proves the original
schema is byte-identical). SC-5 default-output snapshots (scan-orchestrator +
token-hotspots) regenerated — diff reviewed as additive-only.

Tests 1008→1012. Self-audit A/A, scanner count unchanged at 13 (C bumps to 14).
Completes v5.6 B (B1 manifest + B2 token-hotspots).

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

tests/lib/active-config-reader.test.mjs

@@ -731,6 +731,9 @@ describe('deriveLoadPattern (v5.6)', () => {
     ['output-style', {}, 'always', 'yes', 'confirmed'],
     ['hook', {}, 'external', 'n/a', 'confirmed'],
     ['mcp', {}, 'always', 'yes', 'inferred'],
+    // v5.6 B2 — kinds surfaced by the token-hotspots discovery surface.
+    ['command', {}, 'on-demand', 'n/a', 'inferred'],        // body loads on /invoke
+    ['harness-config', {}, 'external', 'n/a', 'inferred'],  // settings/manifests: not model context
   ];
   for (const [kind, opts, loadPattern, survivesCompaction, derivationConfidence] of cases) {
     const label = `${kind}${opts.scoped !== undefined ? ` (scoped=${opts.scoped})` : ''}`;