Update to Electric 1.2.x and electric_client 0.8.0#121

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Commits on Jan 6, 2026

feat: Update to Electric 1.2.x and electric_client 0.8.0
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fix: Update Electric 1.2.x API compatibility

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fix: Format code and update example app dependencies

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fix: Add missing database config for PlugSync.Repo in test env

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fix: Revert database port back to 55555

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fix: Use phoenix_sync database for plug_sync tests in CI

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fix: Use embedded mode instead of sandbox for example app tests

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fix: Use port 54321 for all database connections

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docs: Add Sandbox Electric 1.2.x implementation plan
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feat: Deprecate sandbox mode and LiveView streams for Electric 1.2.x

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Commits on Jan 7, 2026

fix: Update example apps to use standard Postgres adapter

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