test(rete): port pararules golden tests; tag Phase 1 parity (P1.14)

10 integration tests in packages/rete/tests/golden/ manually wire
AlphaNode → BetaMemory → JoinNode → ProductionNode chains and drive
them via Session.insert/retract. Each test maps to a pararules Nim
reference test (documented in GOLDEN-MAP.md).

Coverage: packages/rete/src at 96.8% statements / 95.4% branch /
97.8% functions — all well above the 90% Phase 1 gate.

Tests: 227 total (166 pre-existing + 61 new golden), all green.

packages/rete/tsconfig.json

@@ -2,8 +2,7 @@
   "extends": "../../tsconfig.base.json",
   "compilerOptions": {
     "outDir": "dist",
-    "rootDir": "src",
     "composite": true
   },
-  "include": ["src/**/*"]
+  "include": ["src/**/*", "tests/**/*"]
 }