Complete scoped activation of Chronicle reactors and reducers

[woksin]

Added

• Scoped activation with a caller-owned Chronicle client: create the client with chronicleArtifactActivator(...) as artifactActivator and reactorCommandResultHandler(...) as reactorResultHandler, then set activateArtifactsInScopes when registering it. Arc never changes the client's options and never disposes the client. (Construct Chronicle reactors and reducers through Arc dependency injection #93)

Changed

• The @cratis/arc.chronicle peer dependency now requires @cratis/chronicle 6.17.0 or later. (Construct Chronicle reactors and reducers through Arc dependency injection #93)
• An Arc-owned Chronicle client is closed only once, even if disposal runs twice. (Construct Chronicle reactors and reducers through Arc dependency injection #93)
• The documentation clarifies class-level versus method-level @onceOnly and what registration verifies for a caller-owned client. (Construct Chronicle reactors and reducers through Arc dependency injection #93)

Review: Opus-only (same-provider) review.

Refs #93