chore: finalize v4.2.1 SQLite migration — consolidate migrations, rem… #35

Job	Run time
lint + dry-run 6 scenarios	16s
uat scenario=lan-only	6s
uat scenario=custom-ip	4s
uat scenario=loopback-only	5s
uat scenario=fail-closed-pkill	5s
uat scenario=loopback-lan	5s
uat scenario=custom-domain	5s
	46s

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