refactor: rename custom components from shannon-* to hightower-*

Renames API server, worker jobs, credentials secret, and workspaces
PVC to use the hightower prefix. Upstream Shannon names (namespace,
Temporal service, package imports, .shannon/ dir) are unchanged.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

apps/api/src/config.ts

@@ -33,6 +33,6 @@ export function loadConfig(): Config {
     k8sNamespace: process.env.K8S_NAMESPACE || 'shannon',
     workerImage,
     workspacesDir: process.env.WORKSPACES_DIR || '/app/workspaces',
-    credentialsSecretName: process.env.CREDENTIALS_SECRET_NAME || 'shannon-credentials',
+    credentialsSecretName: process.env.CREDENTIALS_SECRET_NAME || 'hightower-credentials',
   };
 }

apps/api/src/services/job-builder.ts

@@ -21,7 +21,7 @@ export interface JobParams {
   readonly pipelineTesting?: boolean;
 }
 
-const WORKER_LABEL = 'shannon-worker';
+const WORKER_LABEL = 'hightower-worker';
 const REPO_MOUNT_PATH = '/repo';
 
 export function buildJobSpec(params: JobParams): k8s.V1Job {
@@ -36,7 +36,7 @@ export function buildJobSpec(params: JobParams): k8s.V1Job {
 
   // 2. Build volumes and mounts
   const volumes: k8s.V1Volume[] = [
-    { name: 'workspaces', persistentVolumeClaim: { claimName: 'shannon-workspaces' } },
+    { name: 'workspaces', persistentVolumeClaim: { claimName: 'hightower-workspaces' } },
     { name: 'shm', emptyDir: { medium: 'Memory', sizeLimit: '2Gi' } },
   ];
 

apps/api/src/services/job-manager.ts

@@ -4,7 +4,7 @@
 
 import type * as k8s from '@kubernetes/client-node';
 
-const WORKER_LABEL = 'shannon-worker';
+const WORKER_LABEL = 'hightower-worker';
 
 export async function createJob(batchApi: k8s.BatchV1Api, namespace: string, job: k8s.V1Job): Promise<void> {
   await batchApi.createNamespacedJob({ namespace, body: job });

apps/api/src/services/scan-manager.ts

@@ -26,10 +26,10 @@ export async function startScan(
 ): Promise<ScanResponse> {
   const suffix = randomSuffix();
   const taskQueue = `api-${suffix}`;
-  const jobName = `shannon-worker-${suffix}`;
+  const jobName = `hightower-worker-${suffix}`;
 
   const workspace =
-    input.workspace ?? `${new URL(input.targetUrl).hostname.replace(/[^a-zA-Z0-9-]/g, '-')}_shannon-${Date.now()}`;
+    input.workspace ?? `${new URL(input.targetUrl).hostname.replace(/[^a-zA-Z0-9-]/g, '-')}_hightower-${Date.now()}`;
 
   const job = buildJobSpec({
     jobName,