chore: consistency pass — stale names, artifact leak, and terminology cleanup

[mdproctor]

Overview

Systematic consistency pass to remove stale references, leaked build artefacts, and old terminology following the quarkus-work → casehub-work rename and the casehub-poc → casehub-engine migration.

Changes

Build / Git

• Delete leaked build artefacts at project root: io/, META-INF/, application.properties (compiled classes and JAR manifest from an exploded build)
• Delete engine-model/ ghost directory (module renamed to casehub-engine-common, stale shell with only target/ remained)
• Add docs/superpowers/ to .gitignore and untrack 6 committed plan/spec files (Claude workflow docs belong in the companion workspace, not the project repo)
• Add /io/, /META-INF/, /application.properties to .gitignore to prevent recurrence

Dependency / POM

• Remove duplicate stale scheduler-quartz test dependency from casehub-work-adapter/pom.xml (correct one is casehub-engine-scheduler-quartz; the old module name was never a valid artifactId)
• Fix casehub-work-adapter/pom.xml description: quarkus-work → casehub-work

Documentation / ADR

• Update adr/0003-work-workitem-task-naming.md: io.quarkiverse.work:quarkus-work-api → io.casehub:casehub-work-api, quarkus-work-core → casehub-work-core throughout

CLAUDE.md / Java

• Fix stale quarkus-work references in CLAUDE.md
• Fix stale comments in CallerRef.java and WorkItemLifecycleAdapter.java

GitHub Issues

• Meta-level control knowledge sources — BB1-style stall detection and strategy switching #78, Memory stratification — working, episodic, and semantic panels on CaseContext #80, Dynamic agent selection — capability and confidence-based activation beyond key existence #82, Reason maintenance — structured justification tracking for Binding-triggered Worker activations #83: update body to use engine terminology (CaseContext not CaseFile, Worker/Binding not TaskDefinition, WorkBroker not TaskBroker)
• Reason maintenance — structured justification tracking for Binding-triggered Worker activations #83: update title — "TaskDefinition activations" → "Binding-triggered Worker activations"
• Memory stratification — working, episodic, and semantic panels on CaseContext #80: update title — "panels on CaseFile" → "panels on CaseContext"
• Epic: Milestone, Stage, and Goal — Full Conceptual Alignment #84: remove stale reference to casehub-poc spec file
• feat: casehub-work multi-instance WorkItem spawning — lineage, context, and casehub-work-adapter integration #212: update title — quarkus-work → casehub-work