More robust shutdown process

[fenos]

What kind of change does this PR introduce?

Chore

What is the current behavior?

If one of the components crashes before the server is fully started, we are not gracefully shutting down other services.

What is the new behavior?

• Shared shutdown procedure for worker and api
• Use AbortSignals to notify shutdown
• Always clean up successful started services

[coveralls]

Pull Request Test Coverage Report for Build 9680890030

Details

• 21 of 102 (20.59%) changed or added relevant lines in 6 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage decreased (-0.3%) to 79.761%

---

Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
src/internal/database/migrations/migrate.ts	1	4	25.0%
src/internal/errors/codes.ts	4	9	44.44%
src/internal/pubsub/postgres.ts	2	12	16.67%
src/internal/queue/queue.ts	3	31	9.68%
src/internal/concurrency/async-abort-controller.ts	10	45	22.22%

Totals
Change from base Build 9676081090:	-0.3%
Covered Lines:	12799
Relevant Lines:	15905

---

💛 - Coveralls

[coveralls]

Pull Request Test Coverage Report for Build 9694172129

Details

• 39 of 177 (22.03%) changed or added relevant lines in 8 files are covered.
• 1 unchanged line in 1 file lost coverage.
• Overall coverage decreased (-0.6%) to 79.522%

---

Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
src/internal/database/migrations/migrate.ts	7	10	70.0%
src/internal/database/migrations/progressive.ts	0	3	0.0%
src/internal/errors/codes.ts	4	9	44.44%
src/internal/pubsub/postgres.ts	5	26	19.23%
src/internal/queue/queue.ts	3	54	5.56%
src/internal/concurrency/async-abort-controller.ts	18	73	24.66%

Files with Coverage Reduction	New Missed Lines	%
src/internal/pubsub/postgres.ts	1	45.05%

Totals
Change from base Build 9676081090:	-0.6%
Covered Lines:	12812
Relevant Lines:	15974

---

💛 - Coveralls

[github-actions]

🎉 This PR is included in version 1.6.4 🎉

The release is available on GitHub release

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