fix(tsconfig): route .tsbuildinfo into dist/ for protocol, sdk, back

By default tsc writes the incremental build info to
<package>/tsconfig.tsbuildinfo (next to the tsconfig). In restricted
dev mode /cial/core is RO, so this fails with EROFS — and only the
dist/ subdir is shadow-mounted as writable.

Setting tsBuildInfoFile to "dist/.tsbuildinfo" puts it inside the
writable shadow, matching the convention edge/tsconfig.json already
follows. No behavior change in unrestricted mode or prod (rw paths).

core/back/tsconfig.json

@@ -3,6 +3,7 @@
   "compilerOptions": {
     "outDir": "./dist",
     "rootDir": "./src",
+    "tsBuildInfoFile": "dist/.tsbuildinfo",
     "types": ["node"]
   },
   "references": [{ "path": "../protocol" }],

core/protocol/tsconfig.json

@@ -3,7 +3,8 @@
   "compilerOptions": {
     "outDir": "./dist",
     "rootDir": "./src",
-    "composite": true
+    "composite": true,
+    "tsBuildInfoFile": "dist/.tsbuildinfo"
   },
   "include": ["src/**/*"]
 }

core/sdk/tsconfig.json

@@ -3,7 +3,8 @@
   "compilerOptions": {
     "outDir": "./dist",
     "rootDir": "./src",
-    "composite": true
+    "composite": true,
+    "tsBuildInfoFile": "dist/.tsbuildinfo"
   },
   "references": [{ "path": "../protocol" }],
   "include": ["src/**/*"]