v1.3.0 Restructure Saxonite workspace and upgrade to .NET 10 (#1)

Move Saxonite’s projects into a dedicated `Workspace` folder and align the solution with .NET 10 and the current Common workspace. Update encryption integration, test project structure and coverage, and repository guidance and upgrade notes.

- Relocate application and library projects while retaining Git rename history.
- Split tests into Admin, Online, and Shared projects; add representative behavioral and serialization tests.
- Update Common integration, application version, and repository documentation.

Application version: 1.3.0

Reviewed-on: #1
Co-authored-by: andy <andy@sarand.com>

docs/component-reviews.md

@@ -0,0 +1,8 @@
+# Component Reviews
+
+Last updated: 2026-10-16
+
+| Date | Component | Paths reviewed | Findings / follow-up |
+|---|---|---|---|
+| 2026-10-16 | Repository layout and .NET/Common upgrade | `Workspace/Saxonite.sln`, all `Workspace/*.csproj`, Common project references, web encryption callers and session tests | Debug build and both test projects pass against current Common. Package advisories inherited from Common and machine/database runtime validation remain outstanding. Authenticated-encryption migration impacts cookies, password-reset links, and encrypted query parameters; see [`upgrade-and-encryption.md`](upgrade-and-encryption.md). |
+| 2026-10-16 | Representative Admin, Online, and shared tests | `Workspace/SaxoniteUnitTestsAdmin`, `Workspace/SaxoniteUnitTestsOnline`, `Workspace/SaxoniteUnitTestsShared`; shared bus rules and XML serialization, Admin association/address models, Online profile/address models | All three suites pass: Admin 7, Online 7, Shared 37. Coverage is a targeted baseline across representative classes, not a full application coverage measure. |