refactor: rename the router subsystem to Talkie

The 'router' name was misleading — it's the always-on conversational front-end
(CHAT triage + STEERING into a running workflow), not a routing layer, and it's
distinct from InferenceRouter. Rename core:router -> core:talkie, package
com.correx.core.router -> com.correx.core.talkie, and RouterFacade/Config/State/
Repository/ContextBuilder/Projector/Reducer/Response -> Talkie*. Config section
[router] -> [talkie] (legacy [router] still read as fallback).

Persisted wire formats are preserved: ChatTurnRole.ROUTER and the
RouterNarrationEvent @SerialName("RouterNarration") stay, so existing event
logs still replay. RouterNarrationEvent the class is now TalkieNarrationEvent.

infrastructure/router/build.gradle

@@ -5,7 +5,7 @@ plugins {
 }
 
 dependencies {
-    implementation project(':core:router')
+    implementation project(':core:talkie')
     implementation project(':core:events')
     testImplementation "org.junit.jupiter:junit-jupiter"
     testImplementation "org.jetbrains.kotlinx:kotlinx-coroutines-test"

infrastructure/router/turbovec/build.gradle

@@ -5,7 +5,7 @@ plugins {
 }
 
 dependencies {
-    implementation project(':core:router')
+    implementation project(':core:talkie')
     implementation project(':core:sessions')
     implementation project(':core:events')
     testImplementation "org.junit.jupiter:junit-jupiter"

infrastructure/router/turbovec/src/main/kotlin/com/correx/infrastructure/router/turbovec/TurboVecL3MemoryStore.kt

@@ -1,9 +1,9 @@
 package com.correx.infrastructure.router.turbovec
 
-import com.correx.core.router.l3.L3Hit
-import com.correx.core.router.l3.L3MemoryEntry
-import com.correx.core.router.l3.L3Query
-import com.correx.core.router.l3.RehydratableL3MemoryStore
+import com.correx.core.talkie.l3.L3Hit
+import com.correx.core.talkie.l3.L3MemoryEntry
+import com.correx.core.talkie.l3.L3Query
+import com.correx.core.talkie.l3.RehydratableL3MemoryStore
 import kotlinx.coroutines.sync.Mutex
 import kotlinx.coroutines.sync.withLock
 import kotlinx.coroutines.withTimeout