CI:

- add Android-generated Resource type baselines for ReactiveUI.Primitives and ReactiveUI.Primitives.Reactive on net10.0-android and net11.0-android

Validation:

- dotnet build ReactiveUI.Primitives net10.0-android Release

- dotnet build ReactiveUI.Primitives.Reactive net10.0-android Release

- net11.0-android local validation is blocked by missing Android API level 37 on this machine; CI has the required SDK

## Reactive operators

- Preserve Rx SelectMany concurrent flattening semantics by delegating through Map(...).Merge().

- Add coverage for concurrent inner emissions used by DynamicData-style Rx migration code.

## Connectable signals

- Replace disposable-field suppressions with an actual IDisposable implementation on ConnectableSignal<T>.

- Latch terminal/disposed state to prevent reconnecting completed or disposed connectable sources.

- Add public API baseline entries and focused TUnit coverage for disposal and RefCount reconnection behavior.

## Test stability

- Make the async throttle supersession test deterministic with a manual TimeProvider instead of wall-clock timing.

## What changed

- Increase the default timeout used by string-pattern Filter regex construction from one second to thirty seconds.

- Preserve explicit Regex overload behavior so caller-supplied timeout settings and error forwarding are unchanged.

## Validation

- Built ReactiveUI.Primitives.Extensions.Tests for net10.0 and net9.0 Release.

- Ran the net10.0 and net9.0 Release Microsoft Testing Platform executables.

- Ran net10.0 Release MTP coverage for extension tests and inspected the changed shared extension file with the MTP coverage MCP.

- Built ReactiveUI.Primitives.slnx locally.

Remove the accidental public ConnectableSignal<T>.Dispose() API from the DynamicData compatibility branch while preserving the terminal latch used by Publish().RefCount().

Update Core public API baselines and remove the test that asserted the rejected public dispose surface. The connection lifetime remains owned by Connect() callers.

Validated with ReactiveUI.Primitives.Tests net8.0, ReactiveUI.Primitives.Reactive net8.0, and the TUnit test executable.

## What changed

- Remove the CA1001/S2931 suppression attributes from ConnectableSignal<T>.

- Keep Connect() caller-owned lifetime semantics by storing the active connection in a non-disposable StrongBox slot while the returned Connection handle owns disposal.

- Preserve the terminal latch behavior added for Publish().RefCount().

## Validation

- Built ReactiveUI.Primitives.Core for net10.0.

- Built and ran ReactiveUI.Primitives.Tests net10.0 with Microsoft Testing Platform/TUnit.

- Built ReactiveUI.Primitives.slnx locally with Android and Apple target framework exclusions.

GitHub only registered the standalone CodeQL check for the previous PR head. This no-op commit forces a fresh pull_request synchronize event so Build, SonarCloud, and CodeQL all attach to the current branch head.

## What changed

- Update README package guidance for the current ReactiveUI.Primitives package set, including reactive UI package variants.

- Document multi-source SyncLatest/CombineLatest, Rx-name SelectMany compatibility, and Filter regex timeout behavior.

- Expand README migration guidance for an existing lean xyz project and a new xyz.Reactive package using ReactiveUI.Primitives.Reactive packages.

- Update packaged Skill.md frontmatter, package chooser, API landmarks, framework notes, and Rx migration playbook.

## Validation

- Ran git diff --check.

- Packed ReactiveUI.Primitives with dotnet pack --no-build and verified README.md, Skill.md, and .agents/skills/reactiveui-primitives/SKILL.md are present in the nupkg.

- Move branch-added operator signals and sinks out of private nested types.

- Add public API baselines for primitive and reactive Advanced namespaces.

- Add focused tests for async lifetimes, connectable signals, create overloads, fatal exceptions, and advanced coordinators.

- Extract small internal helpers for shared observer lifetimes and hard-to-reach coordinator guards.

Co-authored-by: Copilot Autofix powered by AI <223894421+github-code-quality[bot]@users.noreply.github.com>