Recover corrupted DMS deployment-history markers

[shreyas-goenka]

Changes

Repair a missing or malformed resources.json marker only after confirming its existing DMS deployment. Reuse a valid surviving recorded header; otherwise create a new lineage and warn that old saved plans are invalidated. Upload the repaired marker through the approved deployment path.

Reuse the deployment lookup during initialization. Preserve direct-state resources and schema, feature, WAL, access, and service error checks. Fresh non-DMS invocations do not probe DMS.

Stacked above #7056; migration remains before the three follow-up PRs.

Why

DMS holds the resources and versions, so a damaged marker should be recoverable without recreating resources. This supplies the third write case after first deployment and migration.

Tests

Focused package tests/lint and state/DMS/user-agent acceptance pass. Recovery tests cover surviving/fresh lineage and negative gates; upload assertions verify one repair write, unchanged resource IDs, and advancing service versions.

Repository-wide quick checks, Go lints, doctests, and unit tests pass (the invalid local pip index was removed for the test process only). Full acceptance still reports migration-baseline expectation failures and unrelated dependency/SSH failures; Python formatting/lint could not fetch pinned Ruff because PyPI DNS is unavailable. No unrelated expectations were rewritten.

Implementation and PR description written with Codex.

[eng-dev-ecosystem-bot]

Integration test report

Commit: c43801a

Run: 38592154945

	Env	❌​FAIL	🔄​flaky	✅​pass	🙈​skip	Time
❌​	aws linux-2core-8gb	7	4	292	28	28:58
❌​	aws-windows-latest-4core-16gb	7	2	296	26	25:55
❌​	azure linux-2core-8gb	7	2	293	28	26:30
❌​	azure-windows-latest-4core-16gb	7	4	293	26	30:02
❌​	gcp linux-2core-8gb	7		296	28	23:29
❌​	gcp-windows-latest-4core-16gb	7	2	296	26	28:12

19 interesting tests: 12 flaky, 7 FAIL

	Test Name	aws linux-2core-8gb	aws-windows-latest-4core-16gb	azure linux-2core-8gb	azure-windows-latest-4core-16gb	gcp linux-2core-8gb	gcp-windows-latest-4core-16gb
❌​	TestAccept	❌​F	❌​F	❌​F	❌​F	❌​F	❌​F
🔄​	TestAccept/bundle/dms/declined-deploy	✅​p	✅​p	✅​p	🔄​f	✅​p	✅​p
🔄​	TestAccept/bundle/dms/declined-deploy/DMS=true	✅​p	✅​p	✅​p	🔄​f	✅​p	✅​p
🔄​	TestAccept/bundle/dms/depends-on	✅​p	✅​p	✅​p	✅​p	✅​p	🔄​f
🔄​	TestAccept/bundle/dms/depends-on/DMS=true	✅​p	✅​p	✅​p	✅​p	✅​p	🔄​f
❌​	TestAccept/bundle/dms/existing-state	❌​F	❌​F	❌​F	❌​F	❌​F	❌​F
❌​	TestAccept/bundle/dms/existing-state/DMS=	❌​F	❌​F	❌​F	❌​F	❌​F	❌​F
🔄​	TestAccept/bundle/dms/marker-writes	✅​p	🔄​f	✅​p	✅​p	✅​p	✅​p
🔄​	TestAccept/bundle/dms/marker-writes/DMS=true	✅​p	🔄​f	✅​p	✅​p	✅​p	✅​p
🔄​	TestAccept/bundle/dms/no-drift	🔄​f	✅​p	✅​p	✅​p	✅​p	✅​p
🔄​	TestAccept/bundle/dms/no-drift/DMS=true	🔄​f	✅​p	✅​p	✅​p	✅​p	✅​p
❌​	TestAccept/bundle/dms/repeated-migration	❌​F	❌​F	❌​F	❌​F	❌​F	❌​F
❌​	TestAccept/bundle/dms/repeated-migration/DMS=true	❌​F	❌​F	❌​F	❌​F	❌​F	❌​F
❌​	TestAccept/bundle/dms/stale-local-state	❌​F	❌​F	❌​F	❌​F	❌​F	❌​F
❌​	TestAccept/bundle/dms/stale-local-state/DMS=	❌​F	❌​F	❌​F	❌​F	❌​F	❌​F
🔄​	TestAccept/bundle/dms/stale-plan	🔄​f	✅​p	✅​p	🔄​f	✅​p	✅​p
🔄​	TestAccept/bundle/dms/stale-plan/DMS=true/READPLAN=	🔄​f	✅​p	✅​p	🔄​f	✅​p	✅​p
🔄​	TestSyncIncrementalFileSync	✅​p	✅​p	🔄​f	✅​p	✅​p	✅​p
🔄​	TestSyncIncrementalSyncPythonNotebookDelete	✅​p	✅​p	🔄​f	✅​p	✅​p	✅​p

Top 25 slowest tests (at least 2 minutes):

duration	env	testname
4:54	gcp linux-2core-8gb	TestAccept/bundle/dms/marker-writes/DMS=true
4:16	gcp-windows-latest-4core-16gb	TestAccept/bundle/dms/marker-writes/DMS=true
4:01	aws-windows-latest-4core-16gb	TestAccept/bundle/dms/marker-writes/DMS=true
3:46	aws linux-2core-8gb	TestAccept/bundle/dms/marker-writes/DMS=true
3:32	azure-windows-latest-4core-16gb	TestAccept/bundle/dms/marker-writes/DMS=true
3:28	aws-windows-latest-4core-16gb	TestTelemetryEndpoint
3:12	gcp-windows-latest-4core-16gb	TestFilerWorkspaceFilesExtensionsRead
2:53	aws-windows-latest-4core-16gb	TestImportFileFormatSource
2:53	azure linux-2core-8gb	TestAccept/bundle/dms/marker-writes/DMS=true
2:52	azure-windows-latest-4core-16gb	TestFilerRecursiveDelete/workspace_files
2:51	aws-windows-latest-4core-16gb	TestAccept/bundle/dms/stale-plan/DMS=true/READPLAN=
2:45	gcp linux-2core-8gb	TestAccept/bundle/dms/no-drift/DMS=true
2:44	azure-windows-latest-4core-16gb	TestFilerWorkspaceFilesExtensionsReadDir
2:38	gcp-windows-latest-4core-16gb	TestFilerRecursiveDelete/workspace_files
2:32	aws-windows-latest-4core-16gb	TestAccept/bundle/dms/stale-plan/DMS=true/READPLAN=1
2:30	azure-windows-latest-4core-16gb	TestAccept/bundle/dms/stale-plan/DMS=true/READPLAN=
2:24	gcp-windows-latest-4core-16gb	TestAccept/bundle/dms/stale-plan/DMS=true/READPLAN=
2:17	aws linux-2core-8gb	TestFilerWorkspaceFilesExtensionsReadDir
2:16	azure linux-2core-8gb	TestAccept/bundle/dms/declined-deploy/DMS=true
2:16	azure linux-2core-8gb	TestFilerRecursiveDelete/workspace_files_extensions
2:13	azure-windows-latest-4core-16gb	TestFilerRecursiveDelete/workspace_files_extensions
2:11	azure-windows-latest-4core-16gb	TestAccept/bundle/dms/multiple-resources/DMS=true
2:05	gcp linux-2core-8gb	TestFilerWorkspaceFilesExtensionsReadDir
2:02	gcp linux-2core-8gb	TestAccept/bundle/dms/stale-plan/DMS=true/READPLAN=1
2:00	azure-windows-latest-4core-16gb	TestAccept/bundle/dms/depends-on/DMS=true