feat(dursto): write with offset in Database

[kurtisc]

Closes RV-834 and RV-844

What

Implements a write allowing updating an existing value.

Why

This is needed to support writes with an offset

How

Unifies #710 and #711

Splits the single write function into a write (with offset) and set (replacing).

Manually Testing

make all

No change to the benchmark

Tasks for the Author

• Link all Linear issues related to this MR using magic words (e.g. part of, relates to, closes).
• Eliminate dead code and other spurious artefacts introduced in your changes.
• Document new public functions, methods and types.
• Make sure the documentation for updated functions, methods, and types is correct.
• Add tests for bugs that have been fixed.
• Explain changes to regression test captures when applicable.
• Write commit messages in agreement with our guidelines.
• Self-review your changes to ensure they are high-quality.
• Complete all of the above before assigning this MR to reviewers.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 91.27%. Comparing base (94b0af2) to head (4986ee5).
⚠️ Report is 3 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #712   +/-   ##
=======================================
  Coverage   91.26%   91.27%           
=======================================
  Files         108      108           
  Lines       20232    20232           
  Branches    20232    20232           
=======================================
+ Hits        18465    18466    +1     
+ Misses       1391     1390    -1     
  Partials      376      376           

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[github-actions]

Benchmark results for revision 370dd10:

Metric	Duration	TPS
Mean	1.524927504s	26.231
Worst	1.537266161s	26.020
Best	1.514972788s	26.403
Standard Deviation	±4.444058ms	±0.076

Full results

Run	Transfers	Duration	TPS
1	40	1.537266161s	26.020
2	40	1.527070279s	26.194
3	40	1.528225798s	26.174
4	40	1.524166239s	26.244
5	40	1.525349826s	26.223
6	40	1.523267255s	26.259
7	40	1.514972788s	26.403
8	40	1.527505058s	26.186
9	40	1.521880218s	26.283
10	40	1.526731506s	26.200
11	40	1.518735899s	26.338
12	40	1.524162973s	26.244
13	40	1.526469205s	26.204
14	40	1.526720328s	26.200
15	40	1.525516053s	26.221
16	40	1.524982668s	26.230
17	40	1.529303821s	26.156
18	40	1.524079196s	26.245
19	40	1.523420702s	26.257
20	40	1.518724098s	26.338

Compare the results above with those for the default branch.