docs: clarify cron concurrency lanes

docs/.generated/config-baseline.sha256

@@ -1,4 +1,4 @@
-d2b40fe44761f9e412ce3d4336f341c9c4406f990d09219898cb97cd12c0fdd1  config-baseline.json
-200c156a074a1eec03bb04b3852b4fd5f1fa4ffa140cc5acdc5e412a33600f14  config-baseline.core.json
+decbeacc65183b4b2cf7a064c8d8c7846c45fc56c5dd72392dce1ea3117a3808  config-baseline.json
+d8c18c4bd1091dbc74865e1b1fb1bf5c78db12736373a2b4e5a866932b116f86  config-baseline.core.json
 07963db49502132f26db396c56b36e018b110e6c55a68b3cb012d3ec96f43901  config-baseline.channel.json
-74b74cb18ac37c0acaa765f398f1f9edbcee4c43567f02d45c89598a1e13afb4  config-baseline.plugin.json
+f14d1d609ce93893f3bbd6c533251d30328f4deed5cf06da7cb2c9208147dc7a  config-baseline.plugin.json

docs/gateway/configuration-examples.md

@@ -369,7 +369,7 @@ Save to `~/.openclaw/openclaw.json` and you can DM the bot from that number.
   cron: {
     enabled: true,
     store: "~/.openclaw/cron/cron.json",
-    maxConcurrentRuns: 2,
+    maxConcurrentRuns: 2, // cron dispatch + isolated cron agent-turn execution
     sessionRetention: "24h",
     runLog: {
       maxBytes: "2mb",

docs/gateway/configuration-reference.md

@@ -1079,7 +1079,7 @@ Current builds no longer include the TCP bridge. Nodes connect over the Gateway
 {
   cron: {
     enabled: true,
-    maxConcurrentRuns: 2,
+    maxConcurrentRuns: 2, // cron dispatch + isolated cron agent-turn execution
     webhook: "https://example.invalid/legacy", // deprecated fallback for stored notify:true jobs
     webhookToken: "replace-with-dedicated-token", // optional bearer token for outbound webhook auth
     sessionRetention: "24h", // duration string or false

docs/gateway/configuration.md

@@ -397,7 +397,7 @@ cannot roll back unrelated user settings.
     {
       cron: {
         enabled: true,
-        maxConcurrentRuns: 2,
+        maxConcurrentRuns: 2, // cron dispatch + isolated cron agent-turn execution
         sessionRetention: "24h",
         runLog: {
           maxBytes: "2mb",