Move the Conductor client out to dev.dbos:transact-enterprise (#632)

The Conductor client moves out of this module into the closed-source
`dev.dbos:transact-enterprise` artifact (dbos-inc/dbos-enterprise-java).
Core already finds its client through the `ConductorProvider` service
(#626). The enterprise artifact now registers the only implementation.

## What moves

- `conductor/Conductor.java` and the `conductor/protocol` package are
removed, along with `BundledConductorProvider` and its
`META-INF/services` registration.
- `ConductorTest`, `TestWebSocketServer` and the Java-WebSocket test
dependency go with the client.
- The deprecated admin server used two protocol classes,
`WorkflowsOutput` and `StringOrListDeserializer`. It now has
package-private copies in `dev.dbos.transact.admin`.

No public symbol, config key or on-disk write changes outside the
`conductor` packages. `ConductorProvider`, `ConductorConnection`,
`ConductorOptions` and `ConductorProviders` stay.

## When a provider is required

Launch requires exactly one provider only when the application will
connect, and otherwise fails naming the artifact and version to add. The
application connects when:
- a Conductor key is configured; or
- on DBOS Cloud (`DBOS__CLOUD=true`), when `DBOS__CONDUCTOR_APP_NAME`,
`DBOS__CONDUCTOR_KEY` and `DBOS__CONDUCTOR_URL` are all set.

Before this change, any `DBOS__CLOUD=true` launch required a provider,
even one that would never connect. The executor now works out its
Conductor options in the constructor and loads a provider only when
there are options. The `conductorKey` javadoc in `DBOSConfig` and the
Spring starter's `dbos.conductor.key` say the enterprise artifact is
needed.

## Tests

- Tests that launch with Conductor use `TestConductorProvider`, a
test-only provider that connects to nothing and records the options of
each connection.
- `cloudAutoStartsConductor` checks that the `DBOS__CONDUCTOR_*`
variables reach the provider.
- `cloudWithoutConductorSettingsDoesNotConnect` checks that a Cloud
launch without them needs no provider.
- `database/ImportExportRoundTripTest` keeps the export/import
round-trip tests in core and passes the exported records straight to
import:
  - a debounced workflow comes back debounced;
- payloads in the old `workflow_status` columns import into the payload
tables;
  - inputs, outputs and errors keep their Java types.

## Merging

The paired enterprise PR adds the client. Merge this first, then the
enterprise PR once this repo's `Publish` run has finished: enterprise's
publish compiles against the newest core build on GitHub Packages.
Between this publish and the enterprise one, an application that
resolves both artifacts with `+` has no Conductor client.

Applications that connect to Conductor, including DBOS Cloud apps with
Conductor settings, must add `dev.dbos:transact-enterprise` when they
upgrade. This belongs in the 1.3 release notes.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Author: devhawk

gradle/libs.versions.toml

@@ -5,7 +5,6 @@ cron-utils = "9.2.1"
 hibernate = "7.4.10.Final"
 hikaricp = "7.1.0"
 jackson = "3.2.3"
-java-websocket = "1.6.0"
 jaxb-api = "4.0.5"
 jdbi = "3.54.0"
 # jOOQ pinned to 3.19.x for JDK 17 compat https://www.jooq.org/download/support-matrix-jdk
@@ -42,7 +41,6 @@ assertj-core = { module = "org.assertj:assertj-core", version.ref = "assertj" }
 cron-utils = { module = "com.cronutils:cron-utils", version.ref = "cron-utils" }
 hikaricp = { module = "com.zaxxer:HikariCP", version.ref = "hikaricp" }
 jackson-databind = { module = "tools.jackson.core:jackson-databind", version.ref = "jackson" }
-java-websocket = { module = "org.java-websocket:Java-WebSocket", version.ref = "java-websocket" }
 jaxb-api = { module = "jakarta.xml.bind:jakarta.xml.bind-api", version.ref = "jaxb-api" }
 jdbi-core = { module = "org.jdbi:jdbi3-core", version.ref = "jdbi" }
 jdbi-spring = { module = "org.jdbi:jdbi3-spring", version.ref = "jdbi" }

transact-spring-boot-starter/src/main/java/dev/dbos/transact/spring/DBOSProperties.java

@@ -92,7 +92,10 @@ public void setVersion(String version) {
   /** DBOS Cloud conductor connection properties. */
   public static class Conductor {
 
-    /** Conductor API key. */
+    /**
+     * Conductor API key. Connecting to Conductor requires {@code dev.dbos:transact-enterprise} on
+     * the class path.
+     */
     private String key;
 
     /** Conductor domain. */

transact/build.gradle.kts

@@ -25,7 +25,6 @@ dependencies {
   testImplementation(libs.system.stubs.jupiter)
   testRuntimeOnly(libs.junit.platform.launcher)
 
-  testImplementation(libs.java.websocket)
   testImplementation(libs.kryo)
   testImplementation(libs.logback.classic)
   testImplementation(libs.maven.artifact)

transact/src/main/java/dev/dbos/transact/admin/AdminServer.java

@@ -1,6 +1,5 @@
 package dev.dbos.transact.admin;
 
-import dev.dbos.transact.conductor.protocol.WorkflowsOutput;
 import dev.dbos.transact.database.SystemDatabase;
 import dev.dbos.transact.execution.DBOSExecutor;
 import dev.dbos.transact.json.JsonUtility;

transact/src/main/java/dev/dbos/transact/admin/ListQueuedWorkflowsRequest.java

@@ -1,6 +1,5 @@
 package dev.dbos.transact.admin;
 
-import dev.dbos.transact.conductor.protocol.StringOrListDeserializer;
 import dev.dbos.transact.workflow.ListWorkflowsInput;
 import dev.dbos.transact.workflow.WorkflowState;
 

transact/src/main/java/dev/dbos/transact/admin/ListWorkflowsRequest.java

@@ -1,6 +1,5 @@
 package dev.dbos.transact.admin;
 
-import dev.dbos.transact.conductor.protocol.StringOrListDeserializer;
 import dev.dbos.transact.workflow.ListWorkflowsInput;
 import dev.dbos.transact.workflow.WorkflowState;
 

…r/protocol/StringOrListDeserializer.java …sact/admin/StringOrListDeserializer.javatransact/src/main/java/dev/dbos/transact/conductor/protocol/StringOrListDeserializer.java renamed to transact/src/main/java/dev/dbos/transact/admin/StringOrListDeserializer.java transact/src/main/java/dev/dbos/transact/conductor/protocol/StringOrListDeserializer.java renamed to transact/src/main/java/dev/dbos/transact/admin/StringOrListDeserializer.java

@@ -1,4 +1,4 @@
-package dev.dbos.transact.conductor.protocol;
+package dev.dbos.transact.admin;
 
 import java.util.ArrayList;
 import java.util.List;
@@ -8,7 +8,7 @@
 import tools.jackson.databind.DeserializationContext;
 import tools.jackson.databind.ValueDeserializer;
 
-public class StringOrListDeserializer extends ValueDeserializer<List<String>> {
+class StringOrListDeserializer extends ValueDeserializer<List<String>> {
   @Override
   public List<String> deserialize(JsonParser p, DeserializationContext ctxt) {
     if (p.currentToken() == JsonToken.START_ARRAY) {

…/conductor/protocol/WorkflowsOutput.java …dbos/transact/admin/WorkflowsOutput.javatransact/src/main/java/dev/dbos/transact/conductor/protocol/WorkflowsOutput.java renamed to transact/src/main/java/dev/dbos/transact/admin/WorkflowsOutput.java transact/src/main/java/dev/dbos/transact/conductor/protocol/WorkflowsOutput.java renamed to transact/src/main/java/dev/dbos/transact/admin/WorkflowsOutput.java

@@ -1,11 +1,11 @@
-package dev.dbos.transact.conductor.protocol;
+package dev.dbos.transact.admin;
 
 import dev.dbos.transact.json.JsonUtility;
 import dev.dbos.transact.workflow.WorkflowStatus;
 
 import java.util.Objects;
 
-public class WorkflowsOutput {
+class WorkflowsOutput {
   public String WorkflowUUID;
 
   // Note, remaining fields are optional