Test Ruma branch with merged borrowed and owned IDs

[zecakeh]

This is still an experiment in Ruma, I am opening this to check how much this change impacts benchmarks.

[codspeed-hq]

Merging this PR will not alter performance

✅ 50 untouched benchmarks

---

_{Comparing zecakeh:merge-ids (985f81e) with main (6c18f73)}

[codecov]

Codecov Report

❌ Patch coverage is 94.47641% with 48 lines in your changes missing coverage. Please review.
✅ Project coverage is 89.83%. Comparing base (45d1691) to head (985f81e).
⚠️ Report is 290 commits behind head on main.
✅ All tests successful. No failed tests found.

Files with missing lines	Patch %	Lines
crates/matrix-sdk-base/src/room/room_info.rs	66.66%	5 Missing and 1 partial ⚠️
crates/matrix-sdk/src/widget/settings/mod.rs	0.00%	6 Missing ⚠️
...base/src/response_processors/e2ee/tracked_users.rs	40.00%	0 Missing and 3 partials ⚠️
crates/matrix-sdk-ui/src/timeline/mod.rs	62.50%	3 Missing ⚠️
crates/matrix-sdk-base/src/room/mod.rs	81.81%	2 Missing ⚠️
...es/matrix-sdk-common/src/deserialized_responses.rs	66.66%	2 Missing ⚠️
crates/matrix-sdk-crypto/src/verification/mod.rs	33.33%	2 Missing ⚠️
crates/matrix-sdk-search/src/index/builder.rs	50.00%	2 Missing ⚠️
crates/matrix-sdk-sqlite/src/utils.rs	0.00%	2 Missing ⚠️
crates/matrix-sdk/src/send_queue/mod.rs	88.23%	2 Missing ⚠️
... and 18 more

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #6201      +/-   ##
==========================================
- Coverage   89.83%   89.83%   -0.01%     
==========================================
  Files         367      367              
  Lines      100975   100884      -91     
  Branches   100975   100884      -91     
==========================================
- Hits        90714    90629      -85     
+ Misses       6719     6714       -5     
+ Partials     3542     3541       -1     

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