docs: update documentation for SSE migration

README.org

@@ -8,7 +8,7 @@ Its ultimate goal is to provide a fast and efficient user interface for Signal c
 The tech stack is Elisp and SQLite (for storing conversations)
 
 ** Setup
-The project assumes a working installation of signal-cli and interfaces with that via JSON-RPC.
+The project assumes a working installation of signal-cli and interfaces with that via JSON-RPC. Noise uses Server-Sent Events (SSE) to receive messages in real-time.
 
 ** Dependencies
 
@@ -138,11 +138,15 @@ Once signal-cli is running and Noise is installed:
 - =M-x noise-new-chat-sync-contacts= — re-sync contacts from signal-cli
 - =M-x noise-receive= — fetch new messages from signal-cli once
 
-While =noise-mode= is enabled, Noise polls signal-cli for new messages
-every =noise-receive-interval= seconds (default 5). Incoming messages,
-delivery/read receipts, typing indicators, and messages sent from your
-other linked devices are all stored locally and reflected in open
-buffers automatically.
+While =noise-mode= is enabled, Noise connects to signal-cli's SSE
+endpoint at =/api/v1/events= for real-time message reception. Incoming
+messages, delivery/read receipts, typing indicators, and messages sent
+from your other linked devices are all stored locally and reflected in
+open buffers automatically.
+
+The SSE connection automatically reconnects with exponential backoff
+if the connection is lost. You can configure the maximum reconnect
+delay via =noise-sse-max-reconnect-delay= (default 60 seconds).
 
 If signal-cli has more than one account registered, set =noise-account=
 to the phone number you want to use (E.164 format), or run