feat(ops): add job center for cross-source job operations

Provide a unified ops console for inspecting, retrying and cancelling
jobs across generation, template/kol assist, knowledge parse, desktop
publish/task, compliance review and monitoring collect sources. Wires
RabbitMQ for retry republish and consolidates the desktop_publish_jobs
columns into the base migration.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

server/migrations/20260421100020_create_desktop_tasks.up.sql

@@ -11,6 +11,12 @@ CREATE TABLE IF NOT EXISTS desktop_publish_jobs (
     scheduled_at TIMESTAMPTZ,
     created_at TIMESTAMPTZ NOT NULL DEFAULT now(),
     updated_at TIMESTAMPTZ NOT NULL DEFAULT now(),
+    article_id BIGINT REFERENCES articles(id),
+    article_version_id BIGINT REFERENCES article_versions(id),
+    status VARCHAR(32) NOT NULL DEFAULT 'queued',
+    compliance_blocked_record_id BIGINT,
+    compliance_blocked_at TIMESTAMPTZ,
+    compliance_blocked_reason TEXT,
     UNIQUE (desktop_id)
 );