docs: document server-side rendering pipeline, response timing middleware, and Telegram pairing API

- Add comprehensive documentation for backend content rendering in AGENTS.md, detailing the new `render_content` and `render_title` Jinja globals built on mistune with media processing, emoji shortcodes, and XSS protection
- Document the `X-Response-Time` header and bottom-left render time indicator in README.md
- Update bot token pricing documentation to clarify fallback vs gateway cost headers
- Add `email_accounts` to soft-delete tables and `idx_users_role` composite index in database schema
- Implement `telegram_pairings` and `telegram_links` table creation with column migration and indexes
- Add `/profile/{username}/telegram` endpoint to docs API with request/unpair actions
- Register `TelegramService` in main.py lifespan and add `response_timing` middleware emitting `X-Response-Time` header
- Introduce `TelegramPairForm` model and `guard_public_host_sync` synchronous host validation function

devplacepy/services/devii/cli.py

@@ -167,9 +167,17 @@ async def run(settings: Settings, prompt: Optional[str] = None) -> None:
     chunk_store = ChunkStore()
     agentic = AgenticController(lessons, settings)
     dispatcher = Dispatcher(
-        CATALOG, client, settings, controller, agentic, is_admin=True
+        CATALOG,
+        client,
+        settings,
+        controller,
+        agentic,
+        is_admin=True,
+        is_primary_admin=True,
+    )
+    tools = CATALOG.tool_schemas_for(
+        client.authenticated, is_admin=True, is_primary_admin=True
     )
-    tools = CATALOG.tool_schemas_for(client.authenticated, is_admin=True)
     agentic.bind(
         llm=llm,
         dispatcher=dispatcher,