node: Increase default rate-limiter config

With the increase in traffic on the network after launch, the old
defaults don't make sense anymore.

Longer term, we should look into throttling outgoing messages as well,
prioritizing original messages over relayed messages.

radicle-cli/examples/rad-config.md

@@ -38,12 +38,12 @@ $ rad config
       "maxOpenFiles": 4096,
       "rate": {
         "inbound": {
-          "fillRate": 0.2,
-          "capacity": 32
+          "fillRate": 2.0,
+          "capacity": 128
         },
         "outbound": {
-          "fillRate": 1.0,
-          "capacity": 64
+          "fillRate": 5.0,
+          "capacity": 256
         }
       },
       "connection": {

radicle-httpd/src/api/v1/profile.rs

@@ -101,12 +101,12 @@ mod routes {
                     "maxOpenFiles": 4096,
                     "rate": {
                       "inbound": {
-                        "fillRate": 0.2,
-                        "capacity": 32
+                        "fillRate": 2.0,
+                        "capacity": 128
                       },
                       "outbound": {
-                        "fillRate": 1.0,
-                        "capacity": 64
+                        "fillRate": 5.0,
+                        "capacity": 256
                       }
                     },
                     "connection": {

radicle/src/node/config.rs

@@ -168,12 +168,12 @@ impl Default for RateLimits {
     fn default() -> Self {
         Self {
             inbound: RateLimit {
-                fill_rate: 0.2,
-                capacity: 32,
+                fill_rate: 2.0,
+                capacity: 128,
             },
             outbound: RateLimit {
-                fill_rate: 1.0,
-                capacity: 64,
+                fill_rate: 5.0,
+                capacity: 256,
             },
         }
     }