feat: admin audit log (v1.4)

[eclectic-coding]

Summary

• AuditEvent model — solid_stack_web_audit_events table with 8 action types; opt-in via rails solid_stack_web:install:migrations
• MigrationsGenerator — new rails solid_stack_web:install:migrations generator produces the migration
• config.current_actor block — identify who performed each action (runs in controller context)
• Recording wired in — JobsController, FailedJobsController, Queues::PausesController, FailedJobs::SelectionsController, Jobs::SelectionsController; gracefully swallows errors so missing migration never breaks the dashboard
• AuditController — HTML + CSV responses; filters by action, actor, and queue; redirects with a helpful message if migration hasn't been run
• View — badge-coloured actions, actor/queue filter links, pagination, CSV export button, "Audit" link in Queue subnav
• Dummy app — seeded with 12 events covering all 8 action types
• Fixes — filter_persist_controller pinned in importmap (was missing since v1.2.0); spec/dummy/log/ fully gitignored to prevent rotated log files being committed

Test plan

• 17 new request specs covering rendering, all three filter types, CSV export, and audit recording
• Full suite: 397 examples, 0 failures, rubocop clean

🤖 Generated with Claude Code

[codecov-commenter]

Codecov Report

❌ Patch coverage is 89.55224% with 7 lines in your changes missing coverage. Please review.
✅ Project coverage is 98.65%. Comparing base (add0914) to head (d08933a).
⚠️ Report is 6 commits behind head on main.

Files with missing lines	Patch %	Lines
...trollers/solid_stack_web/application_controller.rb	70.00%	3 Missing ⚠️
...pp/controllers/solid_stack_web/audit_controller.rb	92.85%	2 Missing ⚠️
app/helpers/solid_stack_web/application_helper.rb	66.66%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #106      +/-   ##
==========================================
- Coverage   99.46%   98.65%   -0.82%     
==========================================
  Files          39       41       +2     
  Lines         749      815      +66     
==========================================
+ Hits          745      804      +59     
- Misses          4       11       +7     

Files with missing lines	Coverage Δ
...lid_stack_web/failed_jobs/selections_controller.rb	100.00% <100.00%> (ø)
...trollers/solid_stack_web/failed_jobs_controller.rb	100.00% <100.00%> (ø)
...lers/solid_stack_web/jobs/selections_controller.rb	100.00% <100.00%> (ø)
app/controllers/solid_stack_web/jobs_controller.rb	100.00% <100.00%> (ø)
...ollers/solid_stack_web/queues/pauses_controller.rb	100.00% <100.00%> (ø)
app/models/solid_stack_web/audit_event.rb	100.00% <100.00%> (ø)
lib/solid_stack_web.rb	100.00% <100.00%> (ø)
...pp/controllers/solid_stack_web/audit_controller.rb	92.85% <92.85%> (ø)
app/helpers/solid_stack_web/application_helper.rb	97.80% <66.66%> (-2.20%)	⬇️
...trollers/solid_stack_web/application_controller.rb	84.09% <70.00%> (-4.49%)	⬇️

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