fix(native): use app .run for crash daemon

[jpnurmi]

Have the native crash daemon adopt the application's existing .run instead of creating a second unrelated .run, and store daemon logs, minidumps, crash envelopes, and signal-handler scratch files within that .run.

Before this change, every native crash daemon run left its log in the top-level database directory, while every generated minidump remained there after its crash. Neither files were in .run directories, so old-run processing never removed them, so logs accumulated per daemon run and minidumps per qualifying crash.

The daemon's unconditional retention of generated minidumps predates PR #1607 and is now redundant. With cache_keep configured, the cache/ directory retains each minidump as a separate .dmp alongside its .envelope, subject to configured cache limits. This provides the same direct debugger access without leaving raw minidumps in the database root indefinitely.

Protect daemon-owned work with a dedicated .run.daemon.lock so old-run processing waits for completion. Keep retry cache and external storage database-global, and leave crashed runs for normal next-launch cleanup.

Tip

Making the native daemon play by the normal .run rules is also a pre-requisite for implementing on_crashed_last_run in a clean way, hooked into the shared "process old runs" mechanism used by all backends:

• feat: add on_crashed_last_run callback #1985

[codecov]

Codecov Report

❌ Patch coverage is 83.05085% with 30 lines in your changes missing coverage. Please review.
✅ Project coverage is 74.50%. Comparing base (dcf9623) to head (80a2621).
⚠️ Report is 1 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #1976      +/-   ##
==========================================
+ Coverage   74.31%   74.50%   +0.18%     
==========================================
  Files         104      104              
  Lines       25638    25609      -29     
  Branches     4627     4621       -6     
==========================================
+ Hits        19054    19081      +27     
+ Misses       5281     5234      -47     
+ Partials     1303     1294       -9     

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.

[jpnurmi]

Tip

👆 The other envelopes are now already processed earlier by the sentry__process_run_envelope call above. Such an extra envelope is already covered by test_native_session_tracking.