feature(event-sourcing): baseline for the architecture review fixes.

- fixed the tool overlay in tui.
- fixed tool calling - added schemas.
- getting all sessionIds via event store.
- instead of sending all events on the replay - there's a new way for replaying.
- session snapshot is now a thing getting sent for previously created sessions.
- added logging to important parts.
- revert workflowId from WorkflowCompletedEvent.

core/events/src/main/kotlin/com/correx/core/events/events/ApprovalEvents.kt

@@ -25,7 +25,9 @@ data class ApprovalRequestedEvent(
     val sessionId: SessionId,
     val stageId: StageId?,
     val projectId: ProjectId?,
-    val userSteering: UserSteering? = null
+    val userSteering: UserSteering? = null,
+    val toolName: String? = null,
+    val preview: String? = null,
 ) : EventPayload
 
 @Serializable
@@ -37,7 +39,7 @@ data class ApprovalDecisionResolvedEvent(
     val tier: Tier,
     val resolutionTimestamp: Instant,
     val reason: String?,
-    val userSteering: UserSteering? = null
+    val userSteering: UserSteering? = null,
 ) : EventPayload
 
 @Serializable
@@ -49,10 +51,10 @@ data class ApprovalGrantCreatedEvent(
     val expiresAt: Instant?,
     val sessionId: SessionId,
     val stageId: StageId?,
-    val projectId: ProjectId?
+    val projectId: ProjectId?,
 ) : EventPayload
 
 @Serializable
 data class ApprovalGrantExpiredEvent(
-    val grantId: GrantId
+    val grantId: GrantId,
 ) : EventPayload

core/events/src/main/kotlin/com/correx/core/events/events/OrchestrationEvents.kt

@@ -18,7 +18,6 @@ data class WorkflowCompletedEvent(
     val sessionId: SessionId,
     val terminalStageId: StageId,
     val totalStages: Int,
-    val workflowId: String,
 ) : EventPayload
 
 @Serializable

core/events/src/main/kotlin/com/correx/core/events/orchestration/OrchestrationState.kt

@@ -6,6 +6,7 @@ import kotlinx.serialization.Serializable
 
 @Serializable
 data class OrchestrationState(
+    val workflowId: String = "",
     val currentStageId: StageId? = null,
     val status: OrchestrationStatus = OrchestrationStatus.IDLE,
     val retryCount: Int = 0,

core/events/src/main/kotlin/com/correx/core/events/stores/EventStore.kt

@@ -47,4 +47,10 @@ interface EventStore {
      * Intended for batch jobs (e.g. CAS liveness scans). Implementations should stream lazily.
      */
     fun allEvents(): Sequence<StoredEvent>
+
+    /**
+     * Return all known session ids in the store.
+     * Implementations should derive this from the session index, not by scanning allEvents().
+     */
+    fun allSessionIds(): Set<SessionId>
 }