docs(clients): ReadBulk timeout is one shared deadline for the command, not per tag

Stream E made the worker wait once for all uncached tags. Fix the Go, Python, Rust, Java
and .NET library docs and CLI help text, the proto comment (default is the worker's
1000 ms), and the worker design doc. Regenerated Contracts Generated/ and the Java
generated protos; both diffs are comment-only.

clients/java/zb-mom-ww-mxgateway-cli/src/main/java/com/zb/mom/ww/mxgateway/cli/MxGatewayCli.java

@@ -1262,7 +1262,7 @@ public final class MxGatewayCli implements Callable<Integer> {
         @Option(
                 names = "--timeout-ms",
                 defaultValue = "0",
-                description = "Per-tag snapshot timeout in milliseconds (0 = worker default).")
+                description = "Snapshot deadline in milliseconds, shared by all tags in the command (0 = worker default, 1000 ms).")
         int timeoutMs;
 
         ReadBulkCommand(MxGatewayCliClientFactory clientFactory) {
@@ -1510,7 +1510,7 @@ public final class MxGatewayCli implements Callable<Integer> {
         @Option(
                 names = "--timeout-ms",
                 defaultValue = "0",
-                description = "Per-tag snapshot timeout in milliseconds (0 = worker default).")
+                description = "Snapshot deadline in milliseconds, shared by all tags in the command (0 = worker default, 1000 ms).")
         int timeoutMs;
 
         @Option(names = "--iterations", defaultValue = "10", description = "Number of ReadBulk calls to perform.")