test(bios): integrate pinned BIOS read-protection baseline

Add --suite bios with hash-verified upstream files and the ARM evaluation checkpoint at 0x08000248. Preserve the r12=0 assertion, original BIOS boot, and all test bytes. Add synthetic adapter and CLI regressions.

On Darwin arm64 the public ROM fails test 1 in debug and release after 64 steps and 543 nominal cycles. Document that this tests protected reads of Nintendo firmware opcodes, not general BIOS service compatibility. Online and offline preparation agree; 39 Python tests pass. Core behavior is unchanged.

tools/gba-tests-bios.lock.json

@@ -0,0 +1,46 @@
+{
+  "repository": "jsmolka/gba-tests",
+  "revision": "a7113b67e63f83a9b321696ddd7042ccfad6c881",
+  "license": "MIT",
+  "rom": "bios/bios.gba",
+  "completion_pc": "0x08000248",
+  "result_register": 12,
+  "files": {
+    "LICENSE": {
+      "sha256": "b59a9ed235d76752c977f04116bc72155a14af48176bdbf50d7e5c29fca35aa7",
+      "bytes": 1070
+    },
+    "README.md": {
+      "sha256": "488f50d9d9031c88cea4161fad69f6460209dd54d965645fa45cf5e972cc9062",
+      "bytes": 434
+    },
+    "bios/bios.asm": {
+      "sha256": "aebc912f7634aca29d926bef61858d59c370a4d96728e53b4cc63d60641dd118",
+      "bytes": 2211
+    },
+    "bios/bios.gba": {
+      "sha256": "9d7b369fa1aa661ff03692b3d79c6f644b623d72983d0fc890e6d87a0409a3c9",
+      "bytes": 1908
+    },
+    "lib/constants.inc": {
+      "sha256": "b4dd3f4760ac1ae7e99cdc7e255f8220eed666e1ab821b150561db58e5d3b7ea",
+      "bytes": 900
+    },
+    "lib/macros.inc": {
+      "sha256": "25b0ff553c4ca99d76ec82c8c9db874e25d6eed58e2e69fa27f1a0fe7a8c46d4",
+      "bytes": 2864
+    },
+    "lib/header.asm": {
+      "sha256": "e9d1e8c7b6382eeb1b7059423ec365e32911f702eadfa51804a2119438a87357",
+      "bytes": 1720
+    },
+    "lib/text.asm": {
+      "sha256": "77e579d6cf0db182fd24e8d420c8c0a81592d78197e8fb06accc8bcfb43db17e",
+      "bytes": 2288
+    },
+    "lib/glyphs.asm": {
+      "sha256": "538beb37f40b1fd56beed9253e0e9eab25444c748adba7440a2093f49e3cbcc9",
+      "bytes": 2545
+    }
+  }
+}