CAMEL-23300: add connectionString option to couchbase-sink kamelet

The camel-couchbase component now supports a connectionString endpoint
option (added in CAMEL-23300) that takes precedence over hostname
extraction for the KV service port. This is required when Testcontainers
maps ports randomly, as the SDK defaults the KV port to 11210 which is
unreachable on the host side.

Expose the new option as an optional kamelet property so that
camel-kafka-connector and other kamelet consumers can pass the full
SDK connection string (e.g. couchbase://host:mappedKvPort).

Author: Croway

kamelets/couchbase-sink.kamelet.yaml

@@ -72,6 +72,10 @@ spec:
         description: The starting id
         type: integer
         default: 1
+      connectionString:
+        title: Connection String
+        description: The full Couchbase SDK connection string (e.g. couchbase://host:port). When set, it takes precedence over hostname extraction for the KV service port.
+        type: string
       autoStartId:
         title: Auto Start Id
         description: Auto Start Id or not
@@ -92,3 +96,4 @@ spec:
             startingIdForInsertsFrom: "{{startingId}}"
             username: "{{username}}"
             password: "{{password}}"
+            connectionString: "{{?connectionString}}"

library/camel-kamelets/src/main/resources/kamelets/couchbase-sink.kamelet.yaml

@@ -72,6 +72,10 @@ spec:
         description: The starting id
         type: integer
         default: 1
+      connectionString:
+        title: Connection String
+        description: The full Couchbase SDK connection string (e.g. couchbase://host:port). When set, it takes precedence over hostname extraction for the KV service port.
+        type: string
       autoStartId:
         title: Auto Start Id
         description: Auto Start Id or not
@@ -92,3 +96,4 @@ spec:
             startingIdForInsertsFrom: "{{startingId}}"
             username: "{{username}}"
             password: "{{password}}"
+            connectionString: "{{?connectionString}}"