Add next enterprise integration pattern batch

[JerrettDavis]

Goal

Add the next batch of enterprise integration patterns that are not currently represented in the PatternKit catalog.

Candidate patterns

• Channel Purger
• Invalid Message Channel
• Durable Subscriber
• Dynamic Router
• Message Bus
• Messaging Bridge

Acceptance criteria

For each accepted pattern:

• Fluent runtime API in PatternKit.Core.
• Source-generated route and diagnostics where appropriate.
• TinyBDD tests for core behavior, generator behavior, examples, docs/catalog readiness, and production examples.
• Production-oriented example with IServiceCollection / hosting-friendly integration where it makes sense.
• BenchmarkDotNet fluent vs generated construction/execution scenario coverage.
• README/docs/catalog/benchmark matrix updates.

Initial implementation order

Start with Channel Purger, then Invalid Message Channel, then Durable Subscriber/Dynamic Router depending on API shape.

[JerrettDavis]

Landed Channel Purger on main in 4a2f7b0 via PR #364. Included fluent runtime API, [GenerateChannelPurger], TinyBDD core/generator/example coverage, IServiceCollection inventory example, catalog/docs updates, and BenchmarkDotNet fluent vs generated rows. Remaining candidates from this batch: Invalid Message Channel, Durable Subscriber, Dynamic Router, Message Bus, and Messaging Bridge.

[JerrettDavis]

Landed Invalid Message Channel on main in 5bebfc1 via PR #365. Included fluent runtime API, [GenerateInvalidMessageChannel], TinyBDD core/generator/example coverage, IServiceCollection order import example, catalog/docs updates, and BenchmarkDotNet fluent vs generated rows. Main CI, CodeQL, docs, and codecov are green. Remaining candidates from this batch: Durable Subscriber, Dynamic Router, Message Bus, and Messaging Bridge.

[JerrettDavis]

Landed Durable Subscriber in #366 and merged to main at c72a48e. Main CI, CodeQL, docs publishing, and codecov are green. Added fluent runtime, source generator path, TinyBDD core/generator/example coverage, DI-integrated order shipment projection example, catalogs/docs, and a dedicated BenchmarkDotNet route. Local BDN execution for this single benchmark timed out on Windows, so the published timing rows are marked pending for the next dedicated benchmark sweep rather than using guessed values.

[JerrettDavis]

Fixed the Durable Subscriber benchmark documentation in #367 and merged it to main as 0659206. The BenchmarkDotNet current-TFM rerun completed successfully, and the README plus benchmark guides now show measured fluent vs source-generated rows instead of the pending placeholders. Main CI, CodeQL, and docs publishing are green.

[JerrettDavis]

Landed Dynamic Router in #368 and merged to main at c232ec0, then followed with #369 for analyzer diagnostic release tracking and #370 for generated Control Bus state isolation under parallel CI. Main is green at edae6cb with CI, CodeQL, and docs publishing successful. Dynamic Router includes fluent runtime route-table registration/removal, [GenerateDynamicRouter], TinyBDD core/generator/example/catalog coverage, IServiceCollection fulfillment routing example, docs/catalog updates, and measured BenchmarkDotNet fluent vs generated rows. Remaining candidates from this batch: Message Bus and Messaging Bridge.

[JerrettDavis]

Message Bus landed on main in #373 / 23a69f8. Messaging Bridge has been split into dedicated tracking issue #372 so the remaining work is independently tracked.