feat(grid-agent): supervise grid sessions (#121)

crates/metacrate-grid-agent/README.md

@@ -6,9 +6,10 @@ OpenSim grid agent. It contains a reusable library and the
 offline: it publishes a deterministic ready event, accepts control commands,
 and shuts down both owned tasks without contacting a grid or LLM. The library
 also provides the bounded exact-endpoint LLM transport and tool loop for live
-adapters. The `live-grid` feature exposes the side-effect-free owner for the existing
-`libremetaverse::GridClient`; later live adapters must extend that manager graph
-instead of adding a protocol client.
+adapters. The `live-grid` feature exposes the owner for the existing
+`libremetaverse::GridClient`. Its supervised session adapter reuses that
+client's native `NetworkManager` for login, event-queue readiness, disconnect
+notifications, and logout instead of adding a protocol client.
 
 The LLM connection identity has exactly two resolved fields:
 `llm.endpoint_url` and `llm.api_key`. The endpoint is used exactly as supplied;
@@ -44,3 +45,6 @@ compatibility envelope, retry rules, and tool-loop safety contract. The central
 origin matrix, approval binding, budgets, prompt-data boundary, and opaque
 backend authorization are specified in
 [`../../docs/grid-agent-policy.md`](../../docs/grid-agent-policy.md).
+The reconnect state machine, generation fencing, offline-work contract, and
+shutdown deadline are specified in
+[`../../docs/grid-agent-session.md`](../../docs/grid-agent-session.md).