Modernize crypto, rebuild database setup, and add SQL migrations - #222

Node.js 20 is deprecated. The following actions target Node.js 20 but are being forced to run on Node.js 24: actions/cache@v4, actions/checkout@v4, actions/setup-dotnet@v4. For more information see: https://github.blog/changelog/2025-09-19-deprecation-of-node-20-on-github-actions-runners/

Prefer 'static readonly' fields over constant array arguments if the called method is called repeatedly and is not mutating the passed array (https://learn.microsoft.com/dotnet/fundamentals/code-analysis/quality-rules/ca1861)

Prefer a 'TryGetValue' call over a Dictionary indexer access guarded by a 'ContainsKey' check to avoid double lookup (https://learn.microsoft.com/dotnet/fundamentals/code-analysis/quality-rules/ca1854)

Member 'Start' does not access instance data and can be marked as static (https://learn.microsoft.com/dotnet/fundamentals/code-analysis/quality-rules/ca1822)

Member 'Stop' does not access instance data and can be marked as static (https://learn.microsoft.com/dotnet/fundamentals/code-analysis/quality-rules/ca1822)

Non-constant fields should not be visible (https://learn.microsoft.com/dotnet/fundamentals/code-analysis/quality-rules/ca2211)

Non-constant fields should not be visible (https://learn.microsoft.com/dotnet/fundamentals/code-analysis/quality-rules/ca2211)

The variable 'length' is assigned but its value is never used

The variable 'stream' is assigned but its value is never used

'WebRequest.Create(string)' is obsolete: 'WebRequest, HttpWebRequest, ServicePoint, and WebClient are obsolete. Use HttpClient instead.' (https://aka.ms/dotnet-warnings/SYSLIB0014)

'WebRequest.Create(string)' is obsolete: 'WebRequest, HttpWebRequest, ServicePoint, and WebClient are obsolete. Use HttpClient instead.' (https://aka.ms/dotnet-warnings/SYSLIB0014)

P/Invoke method 'Changes' should not be visible (https://learn.microsoft.com/dotnet/fundamentals/code-analysis/quality-rules/ca1401)

P/Invoke method 'BusyTimeout' should not be visible (https://learn.microsoft.com/dotnet/fundamentals/code-analysis/quality-rules/ca1401)

P/Invoke method 'Config' should not be visible (https://learn.microsoft.com/dotnet/fundamentals/code-analysis/quality-rules/ca1401)

P/Invoke method 'Close' should not be visible (https://learn.microsoft.com/dotnet/fundamentals/code-analysis/quality-rules/ca1401)

P/Invoke method 'Open16' should not be visible (https://learn.microsoft.com/dotnet/fundamentals/code-analysis/quality-rules/ca1401)

P/Invoke method 'Open' should not be visible (https://learn.microsoft.com/dotnet/fundamentals/code-analysis/quality-rules/ca1401)

Specify marshaling for P/Invoke string arguments (https://learn.microsoft.com/dotnet/fundamentals/code-analysis/quality-rules/ca2101)

P/Invoke method 'Open' should not be visible (https://learn.microsoft.com/dotnet/fundamentals/code-analysis/quality-rules/ca1401)

Specify marshaling for P/Invoke string arguments (https://learn.microsoft.com/dotnet/fundamentals/code-analysis/quality-rules/ca2101)