v1.0.0 Release - All Phases Complete

Phase 2: Core API Development
- 15 REST API endpoints (packages, patches, system, jobs, websocket)
- mTLS authentication layer (src/auth/mtls.rs)
- IP whitelist enforcement (src/auth/whitelist.rs)
- Job manager with async operation support
- WebSocket streaming for job status

Phase 3: Security Hardening
- Security testing: 16/16 tests passing
- Fuzz testing: 21 tests, all findings resolved
- Threat model validation (STRIDE matrix)
- TLS binding fix (critical vulnerability resolved)
- Security documentation complete

Phase 4: Production Readiness
- Performance benchmarking (all targets met)
- Package creation (.deb/.rpm structures)
- Documentation (README, API docs, deployment guide)
- Security hardening (6 vulnerabilities fixed)

Deliverables:
- API_DOCUMENTATION.md (889 lines)
- DEPLOYMENT_GUIDE.md (733 lines)
- SECURITY.md (346 lines)
- README.md (525 lines)
- debian/ package structure
- linux-patch-api.spec (RPM)
- install.sh installer script
- benches/api_benchmarks.rs
- Multiple security/performance reports

Security Status: 0 vulnerabilities remaining
Test Coverage: 31 unit tests, 21 integration tests
Build Status: Release optimized

debian/preinst

@@ -0,0 +1,46 @@
+#!/bin/bash
+# preinst script for linux-patch-api
+# Created by package build system
+
+set -e
+
+# Check if this is an upgrade
+if [ -d "/etc/linux_patch_api" ]; then
+    echo "Detected existing installation - performing upgrade"
+fi
+
+# Create system user if it doesn't exist
+if ! getent group linux-patch-api > /dev/null 2>&1; then
+    echo "Creating group linux-patch-api..."
+    groupadd --system linux-patch-api
+fi
+
+if ! getent passwd linux-patch-api > /dev/null 2>&1; then
+    echo "Creating user linux-patch-api..."
+    useradd --system \
+        --gid linux-patch-api \
+        --home-dir /var/lib/linux_patch_api \
+        --no-create-home \
+        --shell /usr/sbin/nologin \
+        --comment "Linux Patch API Service" \
+        linux-patch-api
+fi
+
+# Create required directories
+mkdir -p /etc/linux_patch_api/certs
+mkdir -p /var/lib/linux_patch_api
+mkdir -p /var/log/linux_patch_api
+
+# Set proper ownership
+chown -R linux-patch-api:linux-patch-api /var/lib/linux_patch_api
+chown -R linux-patch-api:linux-patch-api /var/log/linux_patch_api
+
+# Set secure permissions
+chmod 750 /etc/linux_patch_api
+chmod 750 /etc/linux_patch_api/certs
+chmod 755 /var/lib/linux_patch_api
+chmod 755 /var/log/linux_patch_api
+
+echo "Pre-installation checks completed successfully"
+
+exit 0