🐛 [Bug]: compress middleware ignores no-transform on repeated response Cache-Control lines and misparses quoted directive arguments #4801

Bug Description

While #4708 updated shouldSkip in middleware/compress to check request Cache-Control: no-transform directives across repeated field lines and quoted directive arguments via c.HasHeaderValue(fiber.HeaderCacheControl, "no-transform"), the response check on the next line still calls headerlist.ContainsFold(c.GetRespHeader(fiber.HeaderCacheControl), "no-transform").

Because c.GetRespHeader reads only the first Cache-Control response field line and headerlist.ContainsFold splits on commas inside quoted directive arguments:

1. A no-transform directive added on a second response Cache-Control line (RFC 9110 §5.3 / RFC 9111 §5.2.2.6) is ignored and the response is compressed anyway.
2. A response header such as Cache-Control: public, ext="x,no-transform,y" is split inside the quotes and falsely treated as no-transform.
3. A response header with an escaped quote before no-transform (Cache-Control: ext="a\"", no-transform) fails to match no-transform.

How to Reproduce

app := fiber.New()
app.Use(compress.New())
app.Get("/", func(c fiber.Ctx) error {
    c.Response().Header.Add(fiber.HeaderCacheControl, "public")
    c.Response().Header.Add(fiber.HeaderCacheControl, "no-transform")
    return c.SendString(strings.Repeat("hello ", 200))
})

req := httptest.NewRequest(fiber.MethodGet, "/", nil)
req.Header.Set("Accept-Encoding", "gzip")
resp, _ := app.Test(req)
fmt.Println(resp.Header.Get("Content-Encoding")) // Prints "gzip" instead of ""

Expected Behavior

shouldSkip in middleware/compress should honor no-transform across all response Cache-Control field lines and ignore commas inside quoted directive arguments, matching DefaultReq.HasHeaderValue.

Fiber Version

v3.1.0-beta / main

Code Snippet (optional)

package main

import "github.com/gofiber/fiber/v3"
import "log"

func main() {
  app := fiber.New()

  // Steps to reproduce

  log.Fatal(app.Listen(":3000"))
}

Checklist:

• I agree to follow Fiber's Code of Conduct.
• I have checked for existing issues that describe my problem prior to opening this one.
• I understand that improperly formatted bug reports may be closed without explanation.