chore: docker, config, delivery sinks, dialogue, and agent docs

- Dockerfile: multi-stage build with CGO_ENABLED=0, embedder model copy,
  non-root user, healthcheck, and /data volume.
- docker-compose.yml: mavend + mavweb services with shared volume, health
  checks, and restart policy.
- .gitignore: ignore models/llm/*.gguf, deploy/telegram.env, tmp artifacts.
- deploy/mavend.json: add LLM, phraser, voice sections (embedder, model
  paths, wake sensitivity). Add telegram token env-var expansion.
- deploy/telegram.env.example: template for telegram bot token.
- internal/config/config.go: add LLM config struct, voice config struct
  (embedder, llama, wake sensitivity), telegram token loading.
- telegramsink: add chat intent delivery support alongside existing types.
- voicesink: skip empty payloads in delivery.
- dialogue/session: add chat intent to anaphora resolution, test coverage.
- AGENTS.md: update with LLM embedder, LFM model download/configure steps,
  new UI conventions.
- REARCH.md: architecture research document.
- cmd/mavend/main.go: wire LLM config, phraser, embedder, telegram config,
  WebAuthn, IPC event/routine handlers, and reactive notes.

deploy/mavend.json

@@ -5,6 +5,19 @@
   "socket_path": "/run/maven/mavend.sock",
   "state_dir": "/var/lib/maven",
 
+  "phraser": {
+    "model_path": "/opt/maven/models/llm/LFM2.5/LFM2.5-1.2B-Instruct-Q4_K_M.gguf",
+    "bin_path": "llama-server",
+    "n_gpu_layers": 99,
+    "n_ctx": 2048,
+    "timeout": "20s"
+  },
+
+  "telegram": {
+    "bot_token": "${TELEGRAM_BOT_TOKEN}",
+    "chat_id": "${TELEGRAM_CHAT_ID}"
+  },
+
   "voice": {
     "enabled": true,
     "bind": "0.0.0.0:9100",

deploy/telegram.env.example

@@ -0,0 +1,5 @@
+# Telegram bot token and chat ID for mavend's away-channel reach.
+# Copy this file to deploy/telegram.env and fill in real values.
+# deploy/telegram.env is gitignored — never commit the real secrets.
+TELEGRAM_BOT_TOKEN=
+TELEGRAM_CHAT_ID=