bd-workflows: implement type-based routing within the workflow engine

[snowp]

Instead of always evaluating all workflows for all logs, this tracks a running set of candidate workflows based
on the log type of the log. This allows us to bypass workflows whose next match transitions require a different
log type than the inbound log

Fixes BIT-9477

[Copilot]

Pull request overview

Adds log-type-aware workflow routing to avoid evaluating workflows that cannot match an incoming log.

Changes:

• Adds conservative matcher log-type inference.
• Introduces and integrates a workflow candidate router.
• Adds routing and integration tests.

Reviewed changes

Copilot reviewed 11 out of 11 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
bd-workflows/src/workflow.rs	Computes routes from active workflow state.
bd-workflows/src/test.rs	Supports typed test logs.
bd-workflows/src/routing.rs	Implements candidate routing.
bd-workflows/src/routing_test.rs	Tests route selection and refreshes.
bd-workflows/src/lib.rs	Registers the routing module.
bd-workflows/src/engine.rs	Integrates routing into event processing.
bd-workflows/src/engine_test.rs	Tests routing across workflow transitions.
bd-workflows/src/engine_test_helpers.rs	Propagates test log types.
bd-workflows/src/config.rs	Aggregates configured log types.
bd-log-matcher/src/matcher.rs	Adds log-type sets and matcher inference.
bd-log-matcher/src/matcher_test.rs	Tests type sets and inference.