feat(api): Expose additional config values in /api/stats

Adds the following fields to the stats API response for MeshCore CLI parity:

- config.repeater.max_flood_hops: Max flood hops setting (for 'get flood.max')
- config.repeater.advert_interval_minutes: Local advert interval (for 'get advert.interval')
- config.delays.rx_delay_base: RX delay base setting (for 'get rxdelay')

These fields are already present in config.yaml but were not exposed via the
stats API, making them inaccessible to web dashboards and CLI tools that
communicate over HTTP.

This enables pyMC Console's Terminal to display these values without
requiring direct config file access.

Co-Authored-By: Warp <agent@warp.dev>

repeater/engine.py

@@ -715,6 +715,9 @@ class RepeaterHandler(BaseHandler):
                     "send_advert_interval_hours": self.send_advert_interval_hours,
                     "latitude": repeater_config.get("latitude", 0.0),
                     "longitude": repeater_config.get("longitude", 0.0),
+                    # PYMC_CONSOLE_STATS_PATCH - MeshCore CLI parity
+                    "max_flood_hops": repeater_config.get("max_flood_hops", 3),
+                    "advert_interval_minutes": repeater_config.get("advert_interval_minutes", 120),
                 },
                 "radio": {
                     "frequency": self.radio_config.get("frequency", 0),
@@ -731,6 +734,7 @@ class RepeaterHandler(BaseHandler):
                 "delays": {
                     "tx_delay_factor": delays_config.get("tx_delay_factor", 1.0),
                     "direct_tx_delay_factor": delays_config.get("direct_tx_delay_factor", 0.5),
+                    "rx_delay_base": delays_config.get("rx_delay_base", 0.0),
                 },
             },
             "public_key": None,