Add unit tests for PR #212 review findings and fix compilation errors from generated type changes

SessionRequestBuilderTest.java (+48):
- Add testBuildCreateRequestPropagatesCloudSessionOptions: verifies CloudSessionOptions
  (repository name/ID) are wired through SessionRequestBuilder into the create request JSON.
- Add testBuildCreateRequestOmitsCloudWhenNull: verifies cloud field is omitted when not set.
- Add testCloudSessionOptionsSerializesCorrectly: verifies Jackson serialization round-trip
  of CloudSessionOptions with repository fields.

SessionHandlerTest.java (+48):
- Add testHookInputSessionIdDeserializedForSessionStart: verifies sessionId is deserialized
  from JSON for session.start hook inputs.
- Add testHookInputSessionIdDeserializedForSessionEnd: same for session.end hook inputs.
- Add testHookInputSessionIdDeserializedForUserPromptSubmitted: same for
  user_prompt_submitted hook inputs.

DataObjectCoverageTest.java (+58):
- Add assertNull(input.getSessionId()) to preToolUseHookInputGetters and
  postToolUseHookInputGetters to verify sessionId getter exists and defaults to null.
- Add preToolUseHookInputSessionIdRoundTrip: verifies setSessionId/getSessionId round-trip.
- Add postToolUseHookInputSessionIdRoundTrip: same for PostToolUseHookInput.
- Add customAgentConfigModelGetterAndSetter: verifies model getter/setter on CustomAgentConfig.
- Add customAgentConfigModelFluentChaining: verifies fluent setter returns same instance.
- Add customAgentConfigModelSerializationRoundTrip: verifies Jackson serialization of model.
- Add customAgentConfigModelOmittedWhenNull: verifies model omitted from JSON when null.

RpcWrappersTest.java (+1, -1):
- Fix SessionModelSwitchToParams constructor call: add 5th null argument for new
  reasoningSummary parameter added by codegen.

SessionEventHandlingTest.java (+2, -2):
- Fix SessionStartEventData construction: add 12th null argument for new
  detachedFromSpawningParentSessionId field added by codegen.

GeneratedRpcApiCoverageTest.java (+3, -2):
- Fix SessionFsSetProviderParams constructor: add 4th null argument for new capabilities field.
- Add assertNull(params.capabilities()) to verify the new field accessor.

GeneratedRpcRecordsCoverageTest.java (+11, -10):
- Fix SessionModelSwitchToParams: add 5th null arg, add assertNull for reasoningSummary.
- Fix SkillDefinition: use SkillSource.PROJECT enum instead of raw "project" string.
- Fix DiscoveredMcpServer: use McpServerSource.USER enum instead of DiscoveredMcpServerSource.USER.
- Fix ModelPolicyRecord: use ModelPolicyState.ENABLED enum instead of raw "active" string.
- Fix ModelPolicyRecord dateAdded: use OffsetDateTime.parse() instead of raw string.

Author: edburns

src/main/java/com/github/copilot/sdk/CopilotSession.java

@@ -1706,7 +1706,8 @@ public CompletableFuture<Void> setModel(String model, String reasoningEffort,
             generatedCapabilities = new ModelCapabilitiesOverride(supports, limits);
         }
         return getRpc().model
-                .switchTo(new SessionModelSwitchToParams(sessionId, model, reasoningEffort, null, generatedCapabilities))
+                .switchTo(
+                        new SessionModelSwitchToParams(sessionId, model, reasoningEffort, null, generatedCapabilities))
                 .thenApply(r -> null);
     }
 

src/test/java/com/github/copilot/sdk/SessionRequestBuilderTest.java

@@ -668,8 +668,8 @@ void testResumeRequestSerializesModeFlags() throws Exception {
 
     @Test
     void testBuildCreateRequestPropagatesCloudSessionOptions() throws Exception {
-        var cloud = new CloudSessionOptions().setRepository(
-                new CloudSessionRepository().setOwner("my-org").setName("my-repo").setBranch("main"));
+        var cloud = new CloudSessionOptions()
+                .setRepository(new CloudSessionRepository().setOwner("my-org").setName("my-repo").setBranch("main"));
         var config = new SessionConfig().setCloud(cloud);
 
         CreateSessionRequest request = SessionRequestBuilder.buildCreateRequest(config);
@@ -694,8 +694,8 @@ void testBuildCreateRequestOmitsCloudWhenNull() throws Exception {
 
     @Test
     void testCloudSessionOptionsSerializesCorrectly() throws Exception {
-        var cloud = new CloudSessionOptions().setRepository(
-                new CloudSessionRepository().setOwner("acme").setName("widgets").setBranch("feature-1"));
+        var cloud = new CloudSessionOptions()
+                .setRepository(new CloudSessionRepository().setOwner("acme").setName("widgets").setBranch("feature-1"));
         var config = new SessionConfig().setCloud(cloud);
 
         CreateSessionRequest request = SessionRequestBuilder.buildCreateRequest(config);

src/test/java/com/github/copilot/sdk/generated/rpc/GeneratedRpcRecordsCoverageTest.java

@@ -872,7 +872,8 @@ void sessionsForkResult_record() {
 
     @Test
     void accountGetQuotaResult_nested() {
-        var snapshot = new AccountQuotaSnapshot(null, 100L, 40L, null, 60.0, 5.0, true, java.time.OffsetDateTime.parse("2026-05-01T00:00:00Z"));
+        var snapshot = new AccountQuotaSnapshot(null, 100L, 40L, null, 60.0, 5.0, true,
+                java.time.OffsetDateTime.parse("2026-05-01T00:00:00Z"));
         var result = new AccountGetQuotaResult(Map.of("chat", snapshot));
         assertEquals(1, result.quotaSnapshots().size());
         var s = result.quotaSnapshots().get("chat");
@@ -893,8 +894,8 @@ void mcpConfigListResult_record() {
 
     @Test
     void mcpDiscoverResult_nested() {
-        var server = new DiscoveredMcpServer("discovered-server", DiscoveredMcpServerType.STDIO,
-                McpServerSource.USER, true);
+        var server = new DiscoveredMcpServer("discovered-server", DiscoveredMcpServerType.STDIO, McpServerSource.USER,
+                true);
         var result = new McpDiscoverResult(List.of(server));
         assertEquals(1, result.servers().size());
         assertEquals("discovered-server", result.servers().get(0).name());