Create Windows installation script for daemon/service setup (NSSM / sc.exe)

[siculo]

Summary

Create a PowerShell script to install, update, and configure the Photometoria server as a Windows Service on Windows.

Part of the platform-specific split of #75.

Scope

Service Manager

Platform	Service Manager	Config Location
Windows	Windows Service (sc.exe / NSSM)	Service registry

Script to Create

scripts/install-windows.ps1 supporting three operations:

1. Install

• Copy the binary to C:\Program Files\Photometoria\
• Create default config.toml if not present (from config.toml.example)
• Create the storage directory
• Register the service using NSSM or native sc.exe
• Configure appropriate permissions
• Enable auto-start at boot (Automatic startup type)

2. Update

• Stop the running service
• Back up the current binary
• Replace with the new binary
• Restart the service
• Verify the service is running (health check via GET /api/info)

3. Configure

• Edit config.toml (interactive or via CLI flags)
• Validate configuration before applying
• Restart the service to apply changes

Platform-Specific Details

• Service name: Photometoria
• Configurable startup type (Automatic / Manual)
• Event log integration for logging
• Optional NSSM config: scripts/service-templates/photometoria-nssm.conf

Common Features

• Idempotent: Running install twice must not break the setup
• Uninstall: Support --uninstall to cleanly remove the service
• Status check: --status flag to show service state and health
• Non-destructive updates: config.toml is never overwritten during updates
• Pre-flight checks: Verify prerequisites (e.g., Ollama installed and reachable)

File Structure

scripts/
├── install-windows.ps1
└── service-templates/
    └── photometoria-nssm.conf   # NSSM config (optional)

Acceptance Criteria

• Windows Service install/update/uninstall working
• Config is preserved across updates
• Health check after install/update to verify service is running
• Script is idempotent (safe to run multiple times)
• Documentation in docs/ for Windows setup