feat(critique): structured CritiqueFinding + per-model calibration projection

- CritiqueFinding/CritiqueSeverity/CritiqueRole shared type (BACKLOG B6)
- CritiqueOutcomeCorrelatedEvent + serialization registration (BACKLOG C-A3)
- core/critique module: CriticCalibration state/reducer/projector, keyed by (modelHash, role)
- schema+projection only; live reviewer-loop producer wiring deferred

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

core/critique/build.gradle

@@ -0,0 +1,11 @@
+plugins {
+    id 'java-library'
+    id 'org.jetbrains.kotlin.jvm'
+    id 'org.jetbrains.kotlin.plugin.serialization'
+}
+
+dependencies {
+    implementation(project(":core:events"))
+    testImplementation "org.jetbrains.kotlin:kotlin-test"
+}
+tasks.named("koverVerify").configure { enabled = false }