refactor(protocol): add toolName to ToolResult, remove proto typealiases, rename id→toolCallId, drop Conversation.events()

Three protocol-level changes from Android-client review (items 1-3, 5-6):

1) toolName denormalization in ToolResult (3 layers):
   - :outbox-api/Event.ToolResult: +toolName: String? = null
   - :journal-api/MessageRecord.ToolResult: +toolName: String? = null
   - :proto/Message.ToolResult: +toolName: String? = null
   - :storage-ksqlite, :journal-ksqlite ResultPayload codec: +toolName
   - :standalone/ToolDispatcher, ConversationLoop: thread toolName = call.name
   Nullable + default = backward-compat for already-persisted histories
   and existing clients.

2) Drop proto/Event.kt, AgentEvent.kt, CommonEvent.kt typealiases.
   is proto.Event.End failed with 'Unresolved reference End' (alias
   loses nested-class access). Use pw.binom.agentik.outbox.{Event,
   AgentEvent, CommonEvent} directly everywhere — :proto already has
   api(:outbox-api), the package is visible to consumers, no shim
   needed. 21 files rewired, 3 files deleted.

3) Rename Event.ToolResult.id → toolCallId (option B per user).
   In :outbox-api Event.ToolResult.id == Event.ToolCall.id (one value,
   one name); the persistent journal keeps MessageRecord.ToolResult.id
   as its own PK + toolCallId as FK to the call — different semantics,
   left untouched. Fixed ToolDispatcher bug: emitted id = resultId
   while KDoc claimed id == ToolCall.id; now emits toolCallId = callId.

4) Remove Conversation.events() from :proto; OutboxStore is sole event source.
   Conversation is a pure per-conversation abstraction (send/getMessages/
   rename/close). Live events only via agent.outbox.conversationEvents/
   agentEvents/events. HTTP route /conversations/{id}/events stays for
   wire-compat but routes through outbox internally (map { it.event }).

jvmTest green (95 tasks).

agentik-cli/src/commonMain/kotlin/pw/binom/agentik/cli/commands/SendSubcommand.kt

@@ -27,9 +27,10 @@ class SendSubcommand : AgentikSubcommand("send", "Отправить user-ход
             // Подписываемся на поток событий ДО send: события, отправленные
             // до подписки, не реплеятся (shared-flow без replay).
             val eventsJob = launch {
-                conv.events(Instant.DISTANT_PAST)
+                agent.outbox.conversationEvents(Instant.DISTANT_PAST, conv.id)
                     // onEach печатает и терминальный event, takeWhile лишь
                     // завершает сбор после него.
+                    .map { it.event }
                     .onEach { ev -> emit(ev) }
                     .takeWhile { ev -> !isTerminal(ev) }
                     .collect { }
@@ -53,7 +54,7 @@ class SendSubcommand : AgentikSubcommand("send", "Отправить user-ход
             is Event.AppendText -> println("event AppendText ${escape(ev.body)}")
             is Event.AppendImage -> println("event AppendImage <${ev.body.size}B ${ev.mime}>")
             is Event.ToolCall -> println("event ToolCall ${ev.id} ${ev.toolName} ${escape(ev.toolArgs)}")
-            is Event.ToolResult -> println("event ToolResult ${ev.id} ${escape(ev.result ?: "")}")
+            is Event.ToolResult -> println("event ToolResult ${ev.toolCallId} ${escape(ev.result ?: "")}")
             is Event.End -> println("event End")
             is Event.Interrupted -> println("event Interrupted")
             is Event.Error -> println("event Error ${ev.code ?: ""} ${escape(ev.message)}")