docs: fix changelog missing release dates and garbled ellipsis

[Copilot]

Fixing findings from https://github.com/microsoft/oxidizer/security/quality/ai-findings

Several changelog entries were missing release dates (inconsistent with all other versioned entries), and one entry contained a mojibake sequence (…) from a corrupted UTF-8 ellipsis.

• crates/cachet_memory/CHANGELOG.md: Add - 2026-05-19 to [0.2.1] and - 2026-05-18 to [0.1.0]
• crates/fetch_azure/CHANGELOG.md: Add - 2026-06-18 to [0.1.0]
• crates/multitude/CHANGELOG.md: Replace … with … in the [0.3.0] performance entry

Original prompt

Please apply the following diffs and create a pull request.
Once the PR is ready, give it a title based on the messages of the fixes being applied.

[{"message":"The `[0.2.1]` entry is missing a release date, unlike all other versioned entries in this and other changelogs. Consider adding the release date for consistency.","fixFiles":[{"filePath":"crates/cachet_memory/CHANGELOG.md","diff":"diff --git a/crates/cachet_memory/CHANGELOG.md b/crates/cachet_memory/CHANGELOG.md\n--- a/crates/cachet_memory/CHANGELOG.md\n+++ b/crates/cachet_memory/CHANGELOG.md\n@@ -120,7 +120,7 @@\n \n   - bump MSRV to 1.91 and refresh dependencies ([#457](https://github.com/microsoft/oxidizer/pull/457))\n \n-## [0.2.1]\n+## [0.2.1] - 2026-05-19\n \n - ✨ Features\n \n"}]},{"message":"The `[0.1.0]` entry is missing a release date, unlike all other versioned entries in this and other changelogs. Consider adding the release date for consistency.","fixFiles":[{"filePath":"crates/cachet_memory/CHANGELOG.md","diff":"diff --git a/crates/cachet_memory/CHANGELOG.md b/crates/cachet_memory/CHANGELOG.md\n--- a/crates/cachet_memory/CHANGELOG.md\n+++ b/crates/cachet_memory/CHANGELOG.md\n@@ -141,6 +141,6 @@\n   - Improve thread_aware APIs and anyspawn rt compat. ([#403](https://github.com/microsoft/oxidizer/pull/403))\n   - Add LRU eviction policy for in memory cache ([#369](https://github.com/microsoft/oxidizer/pull/369))\n \n-## [0.1.0]\n+## [0.1.0] - 2026-05-18\n \n Initial release.\n"}]},{"message":"The `[0.1.0]` entry is missing a release date, unlike all other versioned entries in this and other changelogs in the set (e.g. `## [0.1.0] - 2025-12-10`). Consider adding the release date for consistency.","fixFiles":[{"filePath":"crates/fetch_azure/CHANGELOG.md","diff":"diff --git a/crates/fetch_azure/CHANGELOG.md b/crates/fetch_azure/CHANGELOG.md\n--- a/crates/fetch_azure/CHANGELOG.md\n+++ b/crates/fetch_azure/CHANGELOG.md\n@@ -63,7 +63,7 @@\n   - Now requires `0.5.5` of `bytesbuf`\n   - Now requires `0.11.2` of `fetch`\n \n-## [0.1.0]\n+## [0.1.0] - 2026-06-18\n \n - ✨ Features\n \n"}]},{"message":"The entry contains a garbled character sequence `ΓǪ` which appears to be a mojibate rendering of an ellipsis (`…`). This should be corrected to display the intended character properly.","fixFiles":[{"filePath":"crates/multitude/CHANGELOG.md","diff":"diff --git a/crates/multitude/CHANGELOG.md b/crates/multitude/CHANGELOG.md\n--- a/crates/multitude/CHANGELOG.md\n+++ b/crates/multitude/CHANGELOG.md\n@@ -81,7 +81,7 @@\n \n - ⚡ Performance\n \n-  - split allocator hot paths from cold refill/oversizedΓǪ ([#442](https://github.com/microsoft/oxidizer/pull/442))\n+  - split allocator hot paths from cold refill/oversized… ([#442](https://github.com/microsoft/oxidizer/pull/442))\n \n - ✔️ Tasks\n \n"}]}]

[Copilot]

Pull request overview

Updates crate changelogs to improve release-entry consistency and readability by filling in missing release dates and correcting a corrupted ellipsis character.

Changes:

• Added missing release dates to version headings in cachet_memory and fetch_azure changelogs.
• Replaced a mojibake sequence (…) with the intended ellipsis (…) in multitude’s changelog.

Reviewed changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated no comments.

File	Description
crates/cachet_memory/CHANGELOG.md	Adds missing release dates to [0.2.1] and [0.1.0] entries for consistency with surrounding releases.
crates/fetch_azure/CHANGELOG.md	Adds the missing release date to the [0.1.0] entry to match the format of other versions.
crates/multitude/CHANGELOG.md	Fixes a corrupted ellipsis character in a performance bullet to restore intended text.

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 100.0%. Comparing base (2cf0ffe) to head (c000fdf).

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #576   +/-   ##
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  Coverage   100.0%   100.0%           
=======================================
  Files         360      360           
  Lines       27886    27886           
=======================================
  Hits        27886    27886           

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