refresh list of entries

1. Environment

• Device: [Pixel 7]
• OS: [Android 15]
• APP: [0.11.1]

2. Describe the bug

I am testing with a local feed, and the app does not refresh when new entries are added.

I set-up the app and it correctly shows the two entries with the original feed:

<?xml version="1.0"?>
<feed xmlns="http://www.w3.org/2005/Atom">
  <title type="html">John Doe Blog</title>
  <updated>2025-02-09T17:38:42+01:00</updated>
  <id>urn:uuid:fbe283fe-6c1d-4f5e-b5e9-f1058952ab1c</id>
  <author>
    <name>John Doe</name>
    <uri>https://example.org</uri>
    <email>johndoe@example.org</email>
  </author>
  <category term="blog posts"/>
  <link href="https://vivobook.lan/feed.atom" rel="self" type="application/atom+xml"/>
  <rights type="text">Copyright (c) 2025, John Doe</rights>
  <generator uri="https://example.org/feed-generator" version="v0.0.1-alpha"/>
  <entry>
    <title type="text">TITLE 1</title>
    <updated>2025-02-09T17:38:42+01:00</updated>
    <published>2025-02-09T17:13:07+01:00</published>
    <id>urn:uuid:59592fc2-0a7d-47fb-aceb-7d4a7bd6985b</id>
    <author>
      <name>John Doe</name>
      <uri>https://example.org</uri>
      <email>johndoe@example.org</email>
    </author>
    <category term="blog posts"/>
    <content type="html">BODY 1</content>
    <rights type="text">Copyright (c) 2025, John Doe</rights>
  </entry>
  <entry>
    <title type="text">TITLE 2</title>
    <updated>2025-02-09T17:38:42+01:00</updated>
    <published>2025-02-09T17:13:07+01:00</published>
    <id>urn:uuid:ce2bcd3c-6a18-41ac-9f4f-4d5cd8c14bcd</id>
    <author>
      <name>John Doe</name>
      <uri>https://example.org</uri>
      <email>johndoe@example.org</email>
    </author>
    <category term="blog posts"/>
    <content type="html">BODY 2</content>
    <rights type="text">Copyright (c) 2025, John Doe</rights>
  </entry>
</feed>

Afterwards, I added a new third entry, and try to refresh the list, but it does not show up. The new feed is:

<?xml version="1.0"?>
<feed xmlns="http://www.w3.org/2005/Atom">
  <title type="html">John Doe Blog</title>
  <updated>2025-02-09T17:40:26+01:00</updated>
  <id>urn:uuid:fbe283fe-6c1d-4f5e-b5e9-f1058952ab1c</id>
  <author>
    <name>John Doe</name>
    <uri>https://example.org</uri>
    <email>johndoe@example.org</email>
  </author>
  <category term="blog posts"/>
  <link href="https://vivobook.lan/feed.atom" rel="self" type="application/atom+xml"/>
  <rights type="text">Copyright (c) 2025, John Doe</rights>
  <generator uri="https://example.org/feed-generator" version="v0.0.1-alpha"/>
  <entry>
    <title type="text">TITLE 3</title>
    <updated>2025-02-09T17:40:26+01:00</updated>
    <published>2025-02-09T17:40:26+01:00</published>
    <id>urn:uuid:ce2bcd3c-6a18-41ac-9f4f-4d5cd8c14abc</id>
    <author>
      <name>John Doe</name>
      <uri>https://example.org</uri>
      <email>johndoe@example.org</email>
    </author>
    <category term="blog posts"/>
    <content type="html">BODY 3</content>
    <rights type="text">Copyright (c) 2025, John Doe</rights>
  </entry>
  <entry>
    <title type="text">TITLE 1</title>
    <updated>2025-02-09T17:40:26+01:00</updated>
    <published>2025-02-09T17:13:07+01:00</published>
    <id>urn:uuid:59592fc2-0a7d-47fb-aceb-7d4a7bd6985b</id>
    <author>
      <name>John Doe</name>
      <uri>https://example.org</uri>
      <email>johndoe@example.org</email>
    </author>
    <category term="blog posts"/>
    <content type="html">BODY 1</content>
    <rights type="text">Copyright (c) 2025, John Doe</rights>
  </entry>
  <entry>
    <title type="text">TITLE 2</title>
    <updated>2025-02-09T17:40:26+01:00</updated>
    <published>2025-02-09T17:13:07+01:00</published>
    <id>urn:uuid:ce2bcd3c-6a18-41ac-9f4f-4d5cd8c14bcd</id>
    <author>
      <name>John Doe</name>
      <uri>https://example.org</uri>
      <email>johndoe@example.org</email>
    </author>
    <category term="blog posts"/>
    <content type="html">BODY 2</content>
    <rights type="text">Copyright (c) 2025, John Doe</rights>
  </entry>
</feed>

However, when I "clear" the articles and then refresh, the third article does show up.

I do not know what I should do on the server (I have tried playing around with cache-control, and etags, etc, but to no avail).

Here is a screenrecording illustrating the issue.

https://github.com/user-attachments/assets/1db29dba-39c5-441d-b32a-cd795652820e

Reproduce the issue on Android 15 using the local Atom feed shown in the report, then compare a normal refresh with clearing articles before refreshing. Trace the app's feed refresh and caching behavior; done means a newly added third entry appears after refreshing without clearing existing articles.