feat: --lora flag for LoRa-safe announce/poll defaults

Adds --lora to bridge, seed, and gossip commands. When set, overrides
announce-retry-delays to 60,300,900s and poll-interval to 120s, matching
LoRa duty-cycle limits. Explicit user flags always take precedence over the
LoRa defaults, so --lora --announce-retry-delays=30,60 still works.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

src/radicle_reticulum/cli.py

@@ -49,6 +49,24 @@ def detect_radicle_nid() -> Optional[str]:
         return None
 
 
+LORA_ANNOUNCE_DELAYS = "60,300,900"
+LORA_POLL_INTERVAL = 120
+
+
+def _apply_lora_defaults(args) -> None:
+    """Override delay/poll defaults with LoRa-safe values when --lora is set.
+
+    Only overrides fields that were left at their defaults (argparse default
+    strings), so explicit user flags always take precedence.
+    """
+    if not getattr(args, "lora", False):
+        return
+    if getattr(args, "announce_retry_delays", None) == "5,15,30":
+        args.announce_retry_delays = LORA_ANNOUNCE_DELAYS
+    if getattr(args, "poll_interval", None) == 30:
+        args.poll_interval = LORA_POLL_INTERVAL
+
+
 def _parse_delays(s: str) -> Tuple[int, ...]:
     try:
         return tuple(int(x.strip()) for x in s.split(",") if x.strip())
@@ -246,6 +264,7 @@ def _detect_rid(repo_path: Path) -> Optional[str]:
 
 def cmd_gossip(args):
     """Run the gossip relay daemon."""
+    _apply_lora_defaults(args)
     identity = RadicleIdentity.load_or_generate(args.identity)
     _print_identity_info(args.identity)
 
@@ -318,6 +337,7 @@ def cmd_gossip(args):
 
 def cmd_seed(args):
     """Start a dedicated seed radicle-node, bridge, and gossip relay."""
+    _apply_lora_defaults(args)
     seed_home = Path(args.seed_home)
 
     # Validate args before starting any processes
@@ -439,6 +459,7 @@ def cmd_seed(args):
 
 def cmd_bridge(args):
     """Run Radicle-Reticulum bridge."""
+    _apply_lora_defaults(args)
     print("Starting Radicle-Reticulum bridge...")
 
     identity = RadicleIdentity.load_or_generate(args.identity)
@@ -759,8 +780,14 @@ def main():
         "--announce-retry-delays",
         default="5,15,30",
         metavar="SECONDS",
-        help="Startup re-announce delays, comma-separated (default: 5,15,30). "
-             "Use longer values on LoRa, e.g. 60,300,900",
+        help="Startup re-announce delays, comma-separated (default: 5,15,30 for "
+             "WiFi/Ethernet). On LoRa use 60,300,900 to respect duty-cycle limits.",
+    )
+    gossip_parser.add_argument(
+        "--lora",
+        action="store_true",
+        help="Shortcut for LoRa-safe settings: sets --announce-retry-delays=60,300,900 "
+             "and --poll-interval=120 (unless overridden explicitly).",
     )
     add_identity_arg(gossip_parser)
 
@@ -800,8 +827,14 @@ def main():
         "--announce-retry-delays",
         default="5,15,30",
         metavar="SECONDS",
-        help="Startup re-announce delays, comma-separated (default: 5,15,30). "
-             "Use longer values on LoRa, e.g. 60,300,900",
+        help="Startup re-announce delays, comma-separated (default: 5,15,30 for "
+             "WiFi/Ethernet). On LoRa use 60,300,900 to respect duty-cycle limits.",
+    )
+    seed_parser.add_argument(
+        "--lora",
+        action="store_true",
+        help="Shortcut for LoRa-safe settings: sets --announce-retry-delays=60,300,900 "
+             "and --poll-interval=120 (unless overridden explicitly).",
     )
     add_identity_arg(seed_parser)
 
@@ -864,10 +897,16 @@ def main():
         default="5,15,30",
         metavar="SECONDS",
         help=(
-            "Comma-separated delays for startup re-announces (default: 5,15,30). "
-            "On LoRa use longer values to respect duty cycle, e.g. 60,300,900"
+            "Comma-separated delays for startup re-announces (default: 5,15,30 for "
+            "WiFi/Ethernet). On LoRa use 60,300,900 to respect duty-cycle limits."
         ),
     )
+    bridge_parser.add_argument(
+        "--lora",
+        action="store_true",
+        help="Shortcut for LoRa-safe settings: sets --announce-retry-delays=60,300,900 "
+             "(unless overridden explicitly).",
+    )
     add_identity_arg(bridge_parser)
 
     args = parser.parse_args()