refactor: migrate EventStore and MessageStore to :outbox-api and :journal-api

- Replaced usages of `:message-store-api` and `:working-memory-api` with `:journal-api`, `:outbox-api`, and `:context-api`.
- Deprecated legacy `EventStore` and `MessageStore` interfaces, added `typealias` for backward compatibility.
- Updated imports across all modules with references to `:journal-api` and `:outbox-api`.
- Introduced `journalRoutes` and `outboxRoutes` in `:server` for audit log and live event stream endpoints.
- Adjusted `Agent` to expose read-only `journal` and `outbox` stores for improved modularity and clarity.
- Removed legacy Event and AgentEvent definitions from `:proto`, migrated to `:outbox-api`.
- Storage-related modules have been updated to support the new APIs consistently.

server/build.gradle.kts

@@ -24,6 +24,16 @@ kotlin {
         commonMain.dependencies {
             implementation(project(":proto"))
 
+            // Read-only storage handles, которые HTTP-фасад выставляет наружу
+            // под {path}/journal/* и {path}/outbox/*. Типы JournalStore/
+            // OutboxStore фигурируют в сигнатурах internal-функций
+            // journalRoutes/outboxRoutes, поэтому нужны в compile classpath.
+            // Транзитивные api-висимости :proto (:journal-api, :outbox-api)
+            // не доходят до :server из-за implementation(:proto), поэтому
+            // объявляем напрямую.
+            implementation(project(":journal-api"))
+            implementation(project(":outbox-api"))
+
             // Ktor (без engine — engine подключает потребитель, см. :standalone).
             implementation(libs.ktor.server.core)
             implementation(libs.ktor.server.content.negotiation)