fix: isolate agent key usage write failures

Co-Authored-By: Paperclip <noreply@paperclip.ing>

server/src/__tests__/agent-auth-middleware.test.ts

@@ -384,6 +384,39 @@ describe("agent auth middleware", () => {
     ]);
   });
 
+  it("keeps agent-key authentication available when the last-used update fails", async () => {
+    const companyId = randomUUID();
+    const agentId = randomUUID();
+    const token = "pcp_test_agent_key_update_failure";
+    const { db } = createDbState({
+      agent: { id: agentId, companyId },
+      agentKey: {
+        id: randomUUID(),
+        agentId,
+        companyId,
+        keyHash: hashToken(token),
+        responsibleUserId: "user-key",
+      },
+    });
+    db.update = () => ({
+      set: () => ({
+        where: () => Promise.reject(new Error("database unavailable")),
+      }),
+    });
+
+    const res = await request(createApp(db))
+      .get("/actor")
+      .set("Authorization", `Bearer ${token}`);
+
+    expect(res.status).toBe(200);
+    expect(res.body).toMatchObject({
+      type: "agent",
+      agentId,
+      companyId,
+      source: "agent_key",
+    });
+  });
+
   it("rejects agent keys that lack a responsible user binding and audits the denial", async () => {
     const companyId = randomUUID();
     const agentId = randomUUID();

server/src/middleware/auth.ts

@@ -363,16 +363,23 @@ export function actorMiddleware(db: Db, opts: ActorMiddlewareOptions): RequestHa
     });
     const authenticatedAt = new Date();
     if (shouldUpdateAgentApiKeyLastUsed(key.lastUsedAt, authenticatedAt)) {
-      await db
-        .update(agentApiKeys)
-        .set({ lastUsedAt: authenticatedAt })
-        .where(and(
-          eq(agentApiKeys.id, key.id),
-          or(
-            isNull(agentApiKeys.lastUsedAt),
-            lt(agentApiKeys.lastUsedAt, new Date(authenticatedAt.getTime() - AGENT_API_KEY_LAST_USED_THROTTLE_MS)),
-          ),
-        ));
+      try {
+        await db
+          .update(agentApiKeys)
+          .set({ lastUsedAt: authenticatedAt })
+          .where(and(
+            eq(agentApiKeys.id, key.id),
+            or(
+              isNull(agentApiKeys.lastUsedAt),
+              lt(agentApiKeys.lastUsedAt, new Date(authenticatedAt.getTime() - AGENT_API_KEY_LAST_USED_THROTTLE_MS)),
+            ),
+          ));
+      } catch (err) {
+        logger.warn(
+          { err, companyId: key.companyId, agentId: key.agentId, keyId: key.id },
+          "Failed to update agent API key last-used timestamp",
+        );
+      }
     }
 
     req.actor = {