Let observer refusals reach the caller on update and bulk delete

[roncodes]

Fixes #256.

An observer that refuses a write by throwing FleetbaseRequestValidationException had its explanation discarded on two paths. The write was still refused, but the caller saw Invalid request or Error occurred while trying to update a Widget instead of the message the observer wrote. Both sites already had a handler for this exception; each was made unreachable by a catch block one frame deeper.

What changed

• HasApiModelBehavior::updateRecordFromRequest() catches FleetbaseRequestValidationException ahead of its catch-all and rethrows it untouched, so HasApiControllerBehavior::updateRecord() and the global exception handler can render getErrors(). The catch-all keeps wrapping every other exception exactly as before, so database and internal errors still do not leak in production.
• HasApiControllerBehavior::bulkDelete() now catches FleetbaseRequestValidationException, then QueryException, then \Exception. The two specific catches were previously dead code behind the catch-all and were wrapped in a @codeCoverageIgnore block acknowledging that; the block is gone because the branches are now reachable and covered.
• RELEASE.md gains a Fixes section for this change.

Create and single-delete paths were already correct and are unchanged.

Tests

• HasApiModelBehaviorTest: a model whose updating event throws the exception propagates the same instance with getErrors() intact under both app.debug settings, and the row is left unmodified.
• HasApiControllerBehaviorTest: updateRecord() and bulkDelete() return the observer's errors array, and bulkDelete() surfaces a QueryException message through its now-reachable catch.

Both new tests fail against the previous code and pass with the fix.

Validation

• composer test:lint passes.
• composer test:date-drift passes.
• phpstan reports no errors on the two changed source files.
• Full suite with coverage passes and the 100% line, method and class floor holds.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 100.00%. Comparing base (546d962) to head (09af864).

Additional details and impacted files

@@                 Coverage Diff                 @@
##             release/v1.6.62      #259   +/-   ##
===================================================
  Coverage             100.00%   100.00%           
- Complexity              6750      6751    +1     
===================================================
  Files                    398       398           
  Lines                  22505     22511    +6     
===================================================
+ Hits                   22505     22511    +6     

Flag	Coverage Δ
backend	100.00% <100.00%> (ø)

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