Parallel agent work: bandwidth fix, CPU platforms, packaging

5 agents ran in parallel:

1. Fix bandwidth limit (-b): new advance_next_send() prevents drift
   bursts by resetting when >2x interval behind (bandwidth.rs, client.rs, server.rs)

2. Windows + FreeBSD CPU support (cpu.rs):
   - Windows: GetSystemTimes via raw FFI
   - FreeBSD: sysctl kern.cp_time parsing

3. Ubuntu .deb packaging (deploy/deb/):
   - build-deb.sh: creates .deb from pre-built binary
   - test-deb.sh: tests in Ubuntu Docker container

4. Fedora/RHEL RPM packaging (deploy/rpm/):
   - btest-rs.spec: full RPM spec with systemd unit
   - build-rpm.sh + test-rpm.sh

5. Alpine Linux apk packaging (deploy/alpine/):
   - APKBUILD with OpenRC init script
   - test-alpine.sh

58 tests pass, zero warnings.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

deploy/alpine/test-alpine.sh

@@ -0,0 +1,118 @@
+#!/bin/sh
+# Test Alpine Linux packaging for btest-rs
+# Runs inside an Alpine Docker container to build and verify the APK.
+#
+# Usage (from repository root):
+#   docker run --rm -v "$PWD":/src alpine:latest /src/deploy/alpine/test-alpine.sh
+#
+set -eu
+
+ALPINE_DIR="/src/deploy/alpine"
+
+echo "=== Alpine APK packaging test ==="
+echo "Alpine version: $(cat /etc/alpine-release)"
+
+# ── Install build dependencies ──────────────────────────────────────
+echo "--- Installing build dependencies ---"
+apk update
+apk add --no-cache \
+    alpine-sdk \
+    rust \
+    cargo \
+    sudo
+
+# ── Create a non-root build user (abuild refuses to run as root) ──
+echo "--- Setting up build user ---"
+adduser -D builder
+addgroup builder abuild
+echo "builder ALL=(ALL) NOPASSWD: ALL" >> /etc/sudoers
+
+# ── Prepare build tree ──────────────────────────────────────────────
+echo "--- Preparing build tree ---"
+BUILD_DIR="/home/builder/btest-rs"
+mkdir -p "$BUILD_DIR"
+cp "$ALPINE_DIR/APKBUILD" "$BUILD_DIR/"
+cp "$ALPINE_DIR/btest.initd" "$BUILD_DIR/"
+
+# Generate signing key (required by abuild)
+su builder -c "abuild-keygen -a -n -q"
+sudo cp /home/builder/.abuild/*.rsa.pub /etc/apk/keys/
+
+# ── Build the package ──────────────────────────────────────────────
+echo "--- Building APK ---"
+cd "$BUILD_DIR"
+chown -R builder:builder "$BUILD_DIR"
+su builder -c "abuild -r"
+
+echo "--- Build succeeded ---"
+
+# ── Locate and install the package ──────────────────────────────────
+echo "--- Installing built APK ---"
+APK_FILE=$(find /home/builder/packages -name "btest-rs-*.apk" -not -name "*doc*" | head -1)
+if [ -z "$APK_FILE" ]; then
+    echo "FAIL: APK file not found"
+    exit 1
+fi
+echo "Found APK: $APK_FILE"
+apk add --allow-untrusted "$APK_FILE"
+
+# ── Verify installation ────────────────────────────────────────────
+echo "--- Verifying installation ---"
+FAIL=0
+
+# Binary exists and is executable
+if command -v btest >/dev/null 2>&1; then
+    echo "PASS: btest binary installed"
+else
+    echo "FAIL: btest binary not found in PATH"
+    FAIL=1
+fi
+
+# Binary runs (show version / help)
+if btest --help >/dev/null 2>&1; then
+    echo "PASS: btest --help exits successfully"
+else
+    echo "FAIL: btest --help failed"
+    FAIL=1
+fi
+
+# Man page installed
+if [ -f /usr/share/man/man1/btest.1 ]; then
+    echo "PASS: man page installed"
+else
+    echo "FAIL: man page not found"
+    FAIL=1
+fi
+
+# License installed
+if [ -f /usr/share/licenses/btest-rs/LICENSE ]; then
+    echo "PASS: LICENSE installed"
+else
+    echo "FAIL: LICENSE not found"
+    FAIL=1
+fi
+
+# OpenRC init script installed
+if [ -f /etc/init.d/btest ]; then
+    echo "PASS: OpenRC init script installed"
+else
+    echo "FAIL: OpenRC init script not found"
+    FAIL=1
+fi
+
+# Init script is executable
+if [ -x /etc/init.d/btest ]; then
+    echo "PASS: init script is executable"
+else
+    echo "FAIL: init script is not executable"
+    FAIL=1
+fi
+
+# ── Summary ─────────────────────────────────────────────────────────
+echo ""
+if [ "$FAIL" -eq 0 ]; then
+    echo "=== All Alpine packaging tests PASSED ==="
+else
+    echo "=== Some Alpine packaging tests FAILED ==="
+    exit 1
+fi