feat(bots): reactive multi-agent group chat orchestration with CAS leasing (#1007)

Co-authored-by: M57 <hy4ri@users.noreply.github.com>

app/src/main/java/com/m57/hermescontrol/data/model/Profile.kt

@@ -157,6 +157,17 @@ data class GroupChatSyncSnapshot(
             room.revision?.let { roomMap["revision"] = it }
             room.syncRevision?.let { roomMap["syncRevision"] = it }
             room.tombstone?.let { roomMap["tombstone"] = it }
+            room.maxBotMessages?.let { roomMap["maxBotMessages"] = it }
+            room.maxContinuationPasses?.let { roomMap["maxContinuationPasses"] = it }
+            room.systemPrompt?.let { roomMap["systemPrompt"] = it }
+            room.lease?.let { lease ->
+                roomMap["lease"] =
+                    buildMap<String, Any?> {
+                        lease.driverId?.let { put("driverId", it) }
+                        lease.epoch?.let { put("epoch", it) }
+                        lease.expiresAt?.let { put("expiresAt", it) }
+                    }
+            }
             room.members?.let { members ->
                 roomMap["members"] =
                     members.mapNotNull {
@@ -200,6 +211,13 @@ data class GroupChatSyncSnapshot(
     }
 }
 
+@Serializable
+data class GroupChatRoomLease(
+    val driverId: String? = null,
+    val epoch: String? = null,
+    val expiresAt: Long? = null,
+)
+
 @Serializable
 data class GroupChatRoomMeta(
     val id: String? = null,
@@ -214,6 +232,10 @@ data class GroupChatRoomMeta(
     val updatedAt: Long? = null,
     val createdAt: Long? = null,
     val tombstone: Boolean? = null,
+    val lease: GroupChatRoomLease? = null,
+    val maxBotMessages: Int? = null,
+    val maxContinuationPasses: Int? = null,
+    val systemPrompt: String? = null,
 ) {
     val memberNames: List<String>
         get() =

app/src/main/java/com/m57/hermescontrol/data/model/SessionMessagesResponse.kt

@@ -3,6 +3,8 @@ package com.m57.hermescontrol.data.model
 import kotlinx.serialization.Serializable
 import kotlinx.serialization.json.JsonElement
 import kotlinx.serialization.json.JsonPrimitive
+import kotlinx.serialization.json.doubleOrNull
+import kotlinx.serialization.json.longOrNull
 
 @Serializable
 data class SessionMessagesResponse(
@@ -52,6 +54,20 @@ data class SessionMessage(
     val timestampText: String?
         get() = (timestamp as? JsonPrimitive)?.content
 
+    val timestampEpochMs: Long?
+        get() {
+            val prim = timestamp as? JsonPrimitive ?: return null
+            val asLong = prim.longOrNull
+            if (asLong != null) {
+                return if (asLong < 10_000_000_000L) asLong * 1000L else asLong
+            }
+            val asDouble = prim.doubleOrNull
+            if (asDouble != null) {
+                return (asDouble * 1000L).toLong()
+            }
+            return null
+        }
+
     val contentText: String
         get() =
             when (content) {