Q-W1 pt1: extract core/json (json::Reader/Writer), collapse wire Cursor family into core/wire, shared readFileBytes — five JSON decoders and three cursor copies deleted, byte-identical formats, 59/59 green

src/core/util/file_bytes.cpp

@@ -0,0 +1,21 @@
+// core/util/file_bytes implementation — see file_bytes.h.
+
+#include "core/util/file_bytes.h"
+
+#include <fstream>
+
+namespace reasampler {
+
+std::vector<std::uint8_t> readFileBytes(const std::string& path) {
+    std::ifstream f(path, std::ios::binary | std::ios::ate);
+    if (!f) return {};
+    const std::streamoff size = f.tellg();
+    if (size <= 0) return {};
+    std::vector<std::uint8_t> bytes(static_cast<std::size_t>(size));
+    f.seekg(0);
+    f.read(reinterpret_cast<char*>(bytes.data()), size);
+    if (!f) return {};
+    return bytes;
+}
+
+}  // namespace reasampler

src/core/util/file_bytes.h

@@ -0,0 +1,19 @@
+// core/util/file_bytes — the ONE whole-file byte loader (Q-W1; audit T2-03).
+// Pure standard library — NO REAPER, NO SWELL, NO VST3 — but it does blocking
+// file I/O: NEVER call it on the audio thread (off-thread only, the same rule
+// every prior hand-rolled copy carried). Linked by both artifacts.
+
+#pragma once
+
+#include <cstdint>
+#include <string>
+#include <vector>
+
+namespace reasampler {
+
+// Reads the whole file at `path` into a byte buffer. Empty on ANY failure —
+// unopenable, empty file, or short read — so the caller has exactly one
+// "nothing to work with" branch.
+std::vector<std::uint8_t> readFileBytes(const std::string& path);
+
+}  // namespace reasampler