feat(python): add galaxy-* CLI commands (§4.2)

clients/python/README.md

@@ -214,9 +214,22 @@ The method returns an async iterator yielding the generated `DeployEvent`
 proto. Breaking out of the loop, calling `aclose()` on the iterator, or
 cancelling the surrounding task closes the underlying gRPC stream
 cleanly. The streaming RPC requires the same `metadata:read` scope as
-the other Galaxy methods. The CLI does not currently expose a
-streaming `watch-deploy-events` subcommand — use the library API
-directly when subscribing to deploy events from Python.
+the other Galaxy methods.
+
+The CLI exposes the Galaxy Repository RPCs through four subcommands that
+mirror the other clients:
+
+```bash
+mxgw-py galaxy-test-connection --plaintext --json
+mxgw-py galaxy-last-deploy --plaintext --json
+mxgw-py galaxy-discover --plaintext --json
+mxgw-py galaxy-watch --plaintext --json
+```
+
+`galaxy-watch` is bounded by `--max-events` (default `1`) and `--timeout`
+(seconds) so it always terminates; pass `--last-seen-deploy-time` (an
+ISO-8601 timestamp) to suppress the bootstrap event when it matches the
+current cached deploy time.
 
 ## Authentication And TLS