feat: wire L3 write path via Embedder into router

Introduces Embedder contract in core:inference with a NoopEmbedder
default (zero vector) and wires both Embedder and L3MemoryStore into
DefaultRouterFacade. Each ChatTurnEvent emission now embeds the turn
content and writes a corresponding L3MemoryEntry, so cross-session
memory is captured at the source of truth (the event emission point).

InfrastructureModule defaults to NoopEmbedder + InMemoryL3MemoryStore
so the system runs without an external embedding model or vector store
wired. The TurboVec adapter stays unwired for now; switching to it is
a configuration concern (Epic 12 config layer).

Also gitignores apps/tui/logs/ (Kotlin TUI runtime logs, pre-Go rewrite).

infrastructure/src/main/kotlin/com/correx/infrastructure/InfrastructureModule.kt

@@ -9,9 +9,11 @@ import com.correx.core.artifactstore.ArtifactStore
 import com.correx.core.events.EventDispatcher
 import com.correx.core.events.stores.EventStore
 import com.correx.core.inference.CapabilityScore
+import com.correx.core.inference.Embedder
 import com.correx.core.inference.InferenceProvider
 import com.correx.core.inference.InferenceRouter
 import com.correx.core.inference.ModelCapability
+import com.correx.core.inference.NoopEmbedder
 import com.correx.core.inference.Tokenizer
 import com.correx.core.router.DefaultRouterContextBuilder
 import com.correx.core.router.DefaultRouterFacade
@@ -19,6 +21,8 @@ import com.correx.core.router.DefaultRouterReducer
 import com.correx.core.router.DefaultRouterRepository
 import com.correx.core.router.RouterFacade
 import com.correx.core.router.RouterProjector
+import com.correx.core.router.l3.InMemoryL3MemoryStore
+import com.correx.core.router.l3.L3MemoryStore
 import com.correx.core.router.model.RouterConfig
 import com.correx.core.sessions.projections.replay.DefaultEventReplayer
 import com.correx.core.tools.contract.ToolExecutor
@@ -129,17 +133,23 @@ object InfrastructureModule {
         workDir = workDir,
     )
 
+    fun createNoopEmbedder(dimension: Int = 1536): Embedder = NoopEmbedder(dimension)
+
+    fun createInMemoryL3MemoryStore(): L3MemoryStore = InMemoryL3MemoryStore()
+
     fun createRouterFacade(
         eventStore: EventStore,
         inferenceRouter: InferenceRouter,
         config: RouterConfig = RouterConfig(),
         tokenizer: Tokenizer? = null,
+        embedder: Embedder = createNoopEmbedder(),
+        l3MemoryStore: L3MemoryStore = createInMemoryL3MemoryStore(),
     ): RouterFacade {
         val reducer = DefaultRouterReducer()
         val projector = RouterProjector(reducer)
         val replayer = DefaultEventReplayer(eventStore, projector)
         val repository = DefaultRouterRepository(replayer)
         val contextBuilder = DefaultRouterContextBuilder(config, tokenizer)
-        return DefaultRouterFacade(repository, contextBuilder, inferenceRouter, eventStore, config)
+        return DefaultRouterFacade(repository, contextBuilder, inferenceRouter, eventStore, config, null, embedder, l3MemoryStore)
     }
 }