Revert "ci(mergify): upgrade configuration to current format (#4784)"

[mauriceyap]

This reverts commit e0139d8.

[greptile-apps]

Greptile Summary

This PR reverts commit e0139d8 (PR #4784), which had upgraded the Mergify configuration from the pull_request_rules + post_check format to the newer merge_protections format. The revert restores the original configuration structure.

Key changes:

• Reverts top-level key from merge_protections back to pull_request_rules
• Restores conditions: / actions: post_check: success_conditions: structure in place of the if: / success_conditions: pattern used by merge_protections
• Re-adds the title fields for each rule (these had been dropped during the upgrade since there was no equivalent in the merge_protections format)
• Removes migration-related comments that were added by the upgrade commit
• No changes to the underlying approval logic or maintainer lists

Confidence Score: 5/5

• This PR is safe to merge — it is a clean revert of a CI configuration change with no logic modifications.
• The change affects only the Mergify CI configuration file. It is a straightforward revert to the previously working pull_request_rules + post_check format. The approval logic and maintainer lists are identical to what existed before the reverted commit. No application code is touched.
• No files require special attention.

Important Files Changed

Filename	Overview
.mergify.yml	Reverts Mergify config from the newer merge_protections format back to the older pull_request_rules + post_check action format, restoring the title fields and removing migration comments. Logic is functionally equivalent.

Flowchart

%%{init: {'theme': 'neutral'}}%%
flowchart TD
    A[PR Opened] --> B{Has ≥1 approval?}
    B -- No --> C[post_check: pending]
    B -- Yes --> D{Touches internal/lookoutui/?}

    D -- No --> E[Rule 1: Lookout UI check\nNot a Lookout UI PR → PASS]
    D -- Yes --> F{Only Lookout UI files?}

    F -- No --> G[Rule 2: Maintainer check\nMixed files → need ≥2 approvals\nor 1 approval from maintainer]
    F -- Yes --> H[Rule 2: Only Lookout UI files → PASS]

    D -- Yes --> I[Rule 1: Lookout UI check\n≥2 approvals OR\n1 approval + author is frontend/maintainer?]
    I -- No --> J[post_check: FAIL]
    I -- Yes --> K[post_check: PASS]

    G -- Met --> K
    G -- Not Met --> J
    E --> K
    H --> K

Loading

_{Last reviewed commit: "Revert "ci(mergify):..."}