Merge origin/main with local pending work and update AGENTS.md references

- Resolve 14 conflicts from popping local stash on top of origin's
  eed1e88 + 8d3352f doc-comment additions (11 mechanical, plus
  version.rs, DashboardAuthenticatorTests.cs, DashboardGalaxyProjector.cs)
- Fix 4 test files that used AGENTS.md as the repo-root sentinel
  (now use CLAUDE.md, since AGENTS.md was removed in 4731ab5)
- Redirect 10 doc citations from AGENTS.md to the matching gateway.md
  sections (Value Model, Status Model, Security, STA Worker Thread
  Model, gRPC Layer rule, cancellation rule)

Verified: solution build clean, x86 worker build clean, 266/266
gateway tests passing, 121/121 worker tests passing.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

clients/rust/src/options.rs

@@ -8,6 +8,8 @@ use std::time::Duration;
 
 use crate::auth::ApiKey;
 
+const DEFAULT_MAX_GRPC_MESSAGE_BYTES: usize = 16 * 1024 * 1024;
+
 /// Configuration for connecting to a gateway endpoint.
 ///
 /// Defaults are 10s connect timeout, 30s call timeout, no streaming timeout,
@@ -24,6 +26,7 @@ pub struct ClientOptions {
     connect_timeout: Duration,
     call_timeout: Duration,
     stream_timeout: Option<Duration>,
+    max_grpc_message_bytes: usize,
 }
 
 impl ClientOptions {
@@ -39,6 +42,7 @@ impl ClientOptions {
             connect_timeout: Duration::from_secs(10),
             call_timeout: Duration::from_secs(30),
             stream_timeout: None,
+            max_grpc_message_bytes: DEFAULT_MAX_GRPC_MESSAGE_BYTES,
         }
     }
 
@@ -91,6 +95,11 @@ impl ClientOptions {
         self
     }
 
+    pub fn with_max_grpc_message_bytes(mut self, max_grpc_message_bytes: usize) -> Self {
+        self.max_grpc_message_bytes = max_grpc_message_bytes;
+        self
+    }
+
     /// Configured endpoint URL.
     pub fn endpoint(&self) -> &str {
         &self.endpoint
@@ -130,6 +139,10 @@ impl ClientOptions {
     pub fn stream_timeout(&self) -> Option<Duration> {
         self.stream_timeout
     }
+
+    pub fn max_grpc_message_bytes(&self) -> usize {
+        self.max_grpc_message_bytes
+    }
 }
 
 impl Default for ClientOptions {
@@ -150,6 +163,7 @@ impl fmt::Debug for ClientOptions {
             .field("connect_timeout", &self.connect_timeout)
             .field("call_timeout", &self.call_timeout)
             .field("stream_timeout", &self.stream_timeout)
+            .field("max_grpc_message_bytes", &self.max_grpc_message_bytes)
             .finish()
     }
 }