fix(companion): clear disconnect metadata after reconnect

docs/plans/state.json

@@ -1252,6 +1252,19 @@
       ],
       "test_status": "pnpm test:run src/companion/runtimeClient.test.ts src/companion/platformClients.test.ts src/companion/platformClients.integration.test.ts src/companion/heartbeatLoop.test.ts + pnpm typecheck passing"
     },
+    "companion-runtime-reconnect-clears-disconnect-metadata": {
+      "status": "completed",
+      "date": "2026-02-17",
+      "updated": "2026-02-17",
+      "summary": "Cleared stale disconnect metadata on successful reconnect (`connect`) so `lastDisconnectCode`/`lastDisconnectReason` reflect only the latest completed disconnection lifecycle.",
+      "files_modified": [
+        "src/companion/runtimeClient.ts",
+        "src/companion/runtimeClient.test.ts",
+        "README.md",
+        "docs/plans/state.json"
+      ],
+      "test_status": "pnpm test:run src/companion/runtimeClient.test.ts src/companion/platformClients.test.ts src/companion/platformClients.integration.test.ts src/companion/heartbeatLoop.test.ts + pnpm typecheck passing"
+    },
     "browser-tools-activation-clarity": {
       "status": "completed",
       "date": "2026-02-17",
@@ -5050,7 +5063,7 @@
     }
   },
   "overall_progress": {
-    "total_test_count": 1881,
+    "total_test_count": 1882,
     "all_tests_passing": true,
     "p0_completion": "3/3 (100%)",
     "p1_completion": "4/4 (100%)",