[mstrhakr]

Summary

Fixes #183. Explicitly support migration from the archived dcflachs Compose Manager without silently changing Docker project identity or effective Compose inputs.

• Preserve exact valid historical PHP/event-script identities, including hyphens and repeated separators; probe running/stopped containers, volumes and networks, corroborating container working directories.
• Record original-plugin provenance from runtime files or parsed active/removed manifests. Preserve older compose.yml, Name, envToUse and envPath metadata without overriding current settings.
• Recover and pin ordered Compose inputs from runtime config_files labels. Block conflicting/partial evidence, missing inputs and duplicate ownership instead of guessing.
• Use locked/atomic identity receipts, preserve replaced pins, audit old incorrect pins once, and expose all valid recovery candidates in the existing chooser.
• Prevent managed-stack lookup/update fallbacks from bypassing failed migrations. Deferred schedules retain retry eligibility.
• Add actual autostart/shutdown integration tests, scheduler/manual-update guards, concurrent receipt tests, isolated browser coverage and disposable real-Docker migration cases.

Validation

• Full PHPUnit suite: 1,181 tests, 5,429 assertions, no failures; one deprecation and eight skips.
• Opt-in real-Docker matrix: 4 cases, 94 assertions passed, covering running/stopped/volume-only stacks, reversed file precedence, explicit container names and bind-backed data. Generated test resources cleaned up.
• Bats helper/wrapper suites: 63 tests passed.
• Isolated Chromium identity-chooser regression passed.
• Scoped PHPStan, shell syntax/error-level lint, JS syntax and documentation-link checks passed.

Release Gates

Local implementation gaps are addressed; PR is ready for code review, not a claim that host acceptance is complete. Version/release metadata is unchanged.

• Verify real Community Applications reinstall with custom roots and temporarily unavailable storage.
• Verify original-to-Plus installation/reboot on supported Unraid versions, including obsolete events/packages and legacy WebUI patches.
• Exercise host-level autostart, scheduled updates and shutdown with external env files/relative bind mounts.
• Verify complete live conflict recovery and rollback using backed-up metadata.

See docs/legacy-migration.md for archived-history/installer audit, recovery limitations and acceptance gates. No automatic resource renaming, stack recreation or destructive migration is performed.