volume-manager: load the mount map; pick binary by signature, compose the id-path (S2)

The volume manager reads its policy from configuration at boot (loadTables,
mirroring the device-manager registry load): filesystems.csv (content signature
-> service binary) and volumes.csv (optional id -> mount-prefix override), each
held in a static source buffer with declared bounds. On probe it picks the
binary from the volume's signature (unserved + logged if no row matches, like an
unbound device) and composes the mount path — a volumes.csv override, else the
default /volumes/<id> from volume-map.idString — then spawns that binary with
argv {volume-id, mount-prefix}. Behavior-preserving: fat still ignores argv[2..]
and uses its hardcoded mounts, the binary resolves to /system/services/fat, so
the FULL suite stays green (127/127); the flip to argv-driven mounts and the
/volumes/usb -> id-path migration land in step 5.

build.zig

@@ -317,6 +317,11 @@ pub fn build(b: *std.Build) void {
     // out of the same read-only initrd, before it spawns anything — the registrar
     // has to know its policy before the first provider asks.
     bundled_list.append(b.allocator, .{ .path = "system/configuration/protocol.csv", .binary = b.path("system/configuration/protocol.csv") }) catch @panic("OOM");
+    // The storage mount map (docs/file-system-development/storage-architecture.md):
+    // filesystems.csv (content signature -> service binary) and volumes.csv (the
+    // optional id -> mount-prefix override), both read by the volume manager.
+    bundled_list.append(b.allocator, .{ .path = "system/configuration/filesystems.csv", .binary = b.path("system/configuration/filesystems.csv") }) catch @panic("OOM");
+    bundled_list.append(b.allocator, .{ .path = "system/configuration/volumes.csv", .binary = b.path("system/configuration/volumes.csv") }) catch @panic("OOM");
     // A no-option build assumes neither -Dtest-case nor -Ddiagnose: it ships the
     // production set only. The userspace test fixtures under /test join in only
     // for a test build — which the QEMU harness signals by passing