feat: graceful shutdown with flush and snapshot save

[vshulcz]

No description provided.

[codecov]

Codecov Report

❌ Patch coverage is 64.18685% with 207 lines in your changes missing coverage. Please review.

Files with missing lines	Patch %	Lines
cmd/server/main.go	36.36%	68 Missing and 9 partials ⚠️
internal/infra/crypto/rsaenvelope/envelope.go	49.19%	37 Missing and 26 partials ⚠️
internal/infra/config/file_config.go	67.44%	7 Missing and 7 partials ⚠️
internal/infra/config/helpers.go	63.88%	9 Missing and 4 partials ⚠️
internal/infra/config/server.go	89.79%	5 Missing and 5 partials ⚠️
cmd/agent/main.go	0.00%	8 Missing ⚠️
...infra/http/ginserver/middlewares/crypto_decrypt.go	61.90%	5 Missing and 3 partials ⚠️
internal/infra/config/agent.go	83.33%	3 Missing and 3 partials ⚠️
cmd/server/init.go	0.00%	3 Missing ⚠️
internal/application/metrics/metrics.go	84.61%	2 Missing ⚠️
... and 2 more

Flag	Coverage Δ
unittests	65.04% <64.18%> (+2.46%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Files with missing lines	Coverage Δ
internal/application/agent/agent.go	97.40% <100.00%> (ø)
internal/application/agent/sender.go	84.61% <ø> (ø)
internal/infra/audit/fanout.go	100.00% <100.00%> (ø)
internal/infra/audit/file/writer.go	47.36% <100.00%> (ø)
internal/infra/audit/remote/client.go	37.93% <100.00%> (ø)
internal/infra/collector/runtime/runtime.go	93.42% <ø> (ø)
internal/infra/collector/runtime/state.go	100.00% <ø> (ø)
...ernal/infra/http/ginserver/middlewares/gin_gzip.go	75.43% <ø> (ø)
...nal/infra/http/ginserver/middlewares/hashsha256.go	73.17% <100.00%> (ø)
...nal/infra/http/ginserver/middlewares/zap_logger.go	0.00% <ø> (ø)
... and 19 more

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