Add CHANGELOG.md.

Author: rspeele

CHANGELOG.md

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+# Changelog
+
+## [Unreleased]
+
+## [0.13.0] - 2026-XX-XX
+
+The Rip Van Winkle release.
+
+Rezoom.SQL was dormant from 2020 until this work; 0.13.0 brings it to the 2026 .NET ecosystem. There are breaking changes for anyone upgrading from 0.6.x, which is unlikely due to the
+long dead time and small userbase in the first place. However, on the unlikely chance somebody *does* have a legacy project on an old disk somewhere, the changes should be straightforward to make:
+
+- Change your app.config to an AppSettings.json
+- Plug in the configuration at startup by registering a PlanExecutor with your DI context and using that to run plans.
+- Or use the old Execution.execute approach, but use your DI context (IServiceProvider) in the ExecutionConfig record you pass to it.
+
+See new docs and also check out the samples under the demos folder.
+
+Updating the type provider to work on .NET Standard was based off work originally done by @rkosafo in the "standard" branch.
+
+### Added
+- Multi-target netstandard2.0 / net8.0 / net10.0.
+- `Migrate(MigrationConfig, IServiceProvider)` for DI-friendly migrations.
+- `Migrate(MigrationConfig, connectionString)` overload for standalone migrator tools (resolves [#49](https://github.com/rspeele/Rezoom.SQL/issues/49)).
+- `PlanExecutor` for plan execution via DI.
+- TypeProviderUser smoke tests under `src/TypeProviderUsers/`, runnable via `test-tp-users.ps1`. These exercise the actual published Provider package against live SQLite and Postgres connections.
+- GitHub Actions CI workflow.
+- `DEVELOPER_README.md` documenting the local-feed dev loop and pack scripts.
+- Centralized `Directory.Build.props` + `version.props` / `version.local.props` so the six Rezoom.SQL packages share a single version source.
+- Command type now carries its compile-time Backend as a property. This made it possible to remove the "Provider" part of runtime config since the default can be inferred from the compile-time backend.
+
+### Changed
+- Configuration: `IConfiguration` (appsettings.json, env vars, etc.) replaces `System.Configuration.ConfigurationManager`.
+- `Migrate` signature: `Migrate(MigrationConfig, IServiceProvider)` instead of `Migrate(MigrationConfig)`. Need the service provider for runtime configuration now, can't use static ConfigurationManager.
+- TP-generated code registers each model's default ADO.NET driver automatically, so `RezoomSQL:Providers:{name}` in `appsettings.json` is now optional. Set it only to override the canonical driver for the dialect.
+- SQL Server: `Microsoft.Data.SqlClient` 5.2.2+ replaces the deprecated `System.Data.SqlClient`.
+- SQLite: `Microsoft.Data.Sqlite` 8.0.10+ replaces `System.Data.SQLite.Core` for cross-platform compatibility.
+- FSharp.Core baseline: 8.0.401+. Embedded `TaskBuilder.fs` dropped in favor of FSharp.Core's built-in `task { }`.
+- Tutorial, configuration docs, and API reference tweaked to match the new API. `App.config` XML in samples replaced with `appsettings.json` throughout.
+- Rezoom internals: eliminated custom IServiceConfig in favor of standard IServiceProvider. Renamed ServiceContext to PlanContext to make its usage more clear.
+
+### Removed
+- `System.Configuration.ConfigurationManager` runtime dependency.
+- `dynamicCommand` and `connectionDynamicCommand` from `Rezoom.SQL.Raw`. Dynamic SQL use cases are best handled by `unsafe_inject_raw` inside a static `SQL<...>` query instead. See [doc/Language/DynamicSQL.md](doc/Language/DynamicSQL.md).
+- The separate `TypeProviderUsers.sln` (TPUs are now standalone fsprojs).
+- Travis CI workflow.
+
+### Fixed
+- Type provider loads correctly on both the .NET 10 SDK (via `AssemblyLoadContext.Resolving`) and VS2026's F# tooling (via `AppDomain.AssemblyResolve` plus a netstandard2.0 path redirect for net8.0 references).
+- 3 generative TP bugs worked around.
+- Fixed broken images, links in GitBooks docs.
+
+## [0.6.2] - 2018
+
+Last release before the NET 10 revamp. See git history for changes prior to this.
+
+[Unreleased]: https://github.com/rspeele/Rezoom.SQL/compare/v0.13.0...HEAD
+[0.13.0]: https://github.com/rspeele/Rezoom.SQL/compare/v0.6.2...v0.13.0