docs: define streaming mcp architecture

docs/module-decomposition.md

@@ -42,6 +42,7 @@ crank/
 - secret management domain;
 - agent publishing domain;
 - observability domain.
+- streaming execution domain.
 
 ## 4. Детальная декомпозиция по crate
 
@@ -64,6 +65,7 @@ crank/
 - `auth`
 - `secret`
 - `observability`
+- `streaming`
 - `errors`
 
 ### 4.2. `crank-schema`
@@ -98,6 +100,7 @@ crank/
 - хранение workspace-scoped operations и version snapshots;
 - хранение workspace-scoped secrets и secret versions;
 - хранение agents и agent versions;
+- хранение stream sessions и async jobs;
 - auth profiles;
 - platform API keys;
 - logs и usage aggregates;
@@ -109,6 +112,7 @@ crank/
 
 - исполнение published operation;
 - резолв `auth_profile_ref -> secret -> request auth`;
+- orchestration window/session/job execution;
 - запись invocation events;
 - возврат нормализованного результата.
 
@@ -133,6 +137,7 @@ crank/
 - `platform_api_keys`
 - `logs`
 - `usage`
+- `streaming`
 
 ### 4.9. `apps/mcp-server`
 
@@ -141,6 +146,8 @@ crank/
 - публикация published agent bindings как MCP tools;
 - transport handling;
 - JSON-RPC lifecycle;
+- SSE lifecycle и `Mcp-Session-Id`;
+- tool-family generation для `session` и `async_job`;
 - вызов runtime.
 
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