test: expand host unit coverage for pure OrionHEN modules

Extract host-testable helpers (GitHub commit SHA, account-id base64,
registry entity ids, playtime store, cheat flatten names, toolbox path
helpers, IPC reply body) and grow the util host suite to ~120 cases.
Also phase-split bootstrapper main for clearer launch diagnostics.

source/util/tests/test_http_github.cpp

@@ -0,0 +1,58 @@
+/* Host tests for orion_http_extract_commit_sha. */
+#include "test_harness.h"
+
+#include "http_github.h"
+
+#include <cstring>
+
+static int test_object_sha(void) {
+  char sha[64];
+  const char *json = R"({"sha":"abc123def456","commit":{"message":"x"}})";
+  TEST_ASSERT_TRUE(orion_http_extract_commit_sha(json, sha, sizeof(sha)));
+  TEST_ASSERT_STREQ("abc123def456", sha);
+  return 0;
+}
+
+static int test_array_first_sha(void) {
+  char sha[64];
+  const char *json =
+      R"([{"sha":"firstsha000","commit":{}},{"sha":"secondsha111","commit":{}}])";
+  TEST_ASSERT_TRUE(orion_http_extract_commit_sha(json, sha, sizeof(sha)));
+  TEST_ASSERT_STREQ("firstsha000", sha);
+  return 0;
+}
+
+static int test_missing_sha(void) {
+  char sha[64] = "keep";
+  TEST_ASSERT_TRUE(!orion_http_extract_commit_sha(R"({"commit":{}})", sha,
+                                                  sizeof(sha)));
+  TEST_ASSERT_TRUE(!orion_http_extract_commit_sha(R"([])", sha, sizeof(sha)));
+  TEST_ASSERT_TRUE(!orion_http_extract_commit_sha("not-json", sha, sizeof(sha)));
+  return 0;
+}
+
+static int test_buffer_too_small(void) {
+  char sha[4];
+  TEST_ASSERT_TRUE(!orion_http_extract_commit_sha(
+      R"({"sha":"toolongsha"})", sha, sizeof(sha)));
+  return 0;
+}
+
+static int test_null_args(void) {
+  char sha[16];
+  TEST_ASSERT_TRUE(!orion_http_extract_commit_sha(nullptr, sha, sizeof(sha)));
+  TEST_ASSERT_TRUE(
+      !orion_http_extract_commit_sha(R"({"sha":"x"})", nullptr, 16));
+  TEST_ASSERT_TRUE(!orion_http_extract_commit_sha(R"({"sha":"x"})", sha, 0));
+  return 0;
+}
+
+extern "C" int test_http_github_suite(void) {
+  int fails = 0;
+  fails += orion_test_run("http_github.object_sha", test_object_sha);
+  fails += orion_test_run("http_github.array_first", test_array_first_sha);
+  fails += orion_test_run("http_github.missing_sha", test_missing_sha);
+  fails += orion_test_run("http_github.buf_small", test_buffer_too_small);
+  fails += orion_test_run("http_github.null_args", test_null_args);
+  return fails;
+}