feat(09-03): wire skillRegistryService export and startup DB init

- Add skillRegistryService re-export to services/index.ts after companySkillService
- Add fire-and-forget skill registry DB init in server/src/index.ts after reconcile block
- Uses dynamic import to avoid adding libSQL to critical startup path

server/src/index.ts

@@ -612,6 +612,17 @@ export async function startServer(): Promise<StartedServer> {
     .catch((err) => {
       logger.error({ err }, "startup reconciliation of persisted runtime services failed");
     });
+
+  // [nexus] Initialize skill registry database (fire-and-forget)
+  void (async () => {
+    try {
+      const { getSkillRegistryDb } = await import("./services/skill-registry-db.js");
+      await getSkillRegistryDb();
+      logger.info("skill registry database initialized");
+    } catch (err) {
+      logger.error({ err }, "skill registry init failed");
+    }
+  })();
   
   if (config.heartbeatSchedulerEnabled) {
     const heartbeat = heartbeatService(db as any);

server/src/services/index.ts

@@ -1,6 +1,7 @@
 export { companyService } from "./companies.js";
 export { feedbackService } from "./feedback.js";
 export { companySkillService } from "./company-skills.js";
+export { skillRegistryService } from "./skill-registry.js";
 export { agentService, deduplicateAgentName } from "./agents.js";
 export { agentInstructionsService, syncInstructionsBundleConfigFromFilePath } from "./agent-instructions.js";
 export { assetService } from "./assets.js";