DNR priority not respected between session and static rules

DNR redirect session rules with a lower priority are applied before / instead of static redirect rules with a higher priority. The only way to get the static rule to apply is to remove the session rule, even though the static rule has a higher priority number.

I encountered this bug after updating my Safari version from 17.5 to 18.3

Demo Xcode extension: https://github.com/lenacohen/Safari-Test-Extensions/tree/main/dnr-session-vs-static-redirects
- Visit eff.org and test whether it is redirected to newyorktimes.com (lower priority session rule) or washingtonpost.com (higher priority static rule)

Session rule that overrides a static rule of higher priority:
```
let updateRules = await chrome.declarativeNetRequest.updateSessionRules({addRules: [
{
id: 2,
priority: 1,
action: {
type: "redirect",
redirect: {
url: "http://newyorktimes.com/"
}
},
condition: {
urlFilter: "||eff.org^",
resourceTypes: [
"main_frame"
]
}
}
]});
```

Static rule that is overridden by a session rule of lower priority:
```
{
"id": 1,
"priority": 2,
"action": {
"type": "redirect",
"redirect": {
"url": "http://washingtonpost.com/"
}
},
"condition": {
"urlFilter": "||eff.org^",
"resourceTypes": [
"main_frame"
]
}
}
```

Apple Feedback Assistant Bug Report: [FB16607998](https://feedbackassistant.apple.com/feedback/16607998)
Safari version 18.3
MacOS Sequoia 15.3.1