fix: increase test timeouts for slow CI operations

- adversarial resize 50000x50000: 60s → 120s
- format-matrix HEIF tests: 30s (default) → 90s

tests/integration/adversarial.test.ts

@@ -487,7 +487,7 @@ describe("Extreme dimension requests", () => {
     // May succeed (Sharp allows large), fail at processing (422), or be
     // rejected by validation (400). Must not crash.
     expect([200, 400, 422]).toContain(res.statusCode);
-  }, 60_000);
+  }, 120_000);
 
   it("rejects crop region larger than image dimensions", async () => {
     const res = await postTool("crop", [

tests/integration/format-matrix.test.ts

@@ -349,7 +349,11 @@ describe("Cross-format matrix", () => {
         // Skip "Convert to PNG" when input is already PNG (no-op conversion)
         if (tool.id === "convert" && fmt.name === "PNG") continue;
 
-        it(`${tool.label}`, async () => {
+        const perTestTimeout = fmt.needsHeifDecoder ? 90_000 : undefined;
+
+        it(
+          `${tool.label}`,
+          async () => {
             if (!existsSync(fixturePath)) return;
 
             const buffer = readFileSync(fixturePath);
@@ -424,7 +428,9 @@ describe("Cross-format matrix", () => {
               expect(body.error).toBeDefined();
               expect(typeof body.error).toBe("string");
             }
-        });
+          },
+          perTestTimeout,
+        );
       }
     });
   }