feat: implement fallback when tree_tests_rollup doesn't have data

[gustavobtflores]

Description

Adds fallback logic to treeDetailsSummaryView to handle cases where the pre-aggregated tree_tests_rollup table has not yet been populated for a checkout. When rollup data is empty, the endpoint now falls back to the legacy row-by-row query approach to ensure test/boot summary data is still returned.

Changes

• Added fallback condition in BaseTreeDetailsSummary.get() to detect empty rollup data and trigger legacy query
• Added _sanitize_test_rows_legacy() method to process legacy test/boot rows (modeled after BaseTreeDetails._sanitize_rows() but without build handling since builds are already processed separately)
• Added logging with origin, tree name, and git URL for better debugging when fallback is triggered

[Copilot]

Pull request overview

Adds a safety-net in the tree details summary endpoint so it can still return boot/test summary data when the pre-aggregated tree_tests_rollup table hasn’t been populated yet for a given checkout.

Changes:

• Introduces a rollup-empty detection in BaseTreeDetailsSummary.get() and falls back to the legacy get_tree_details_data() query.
• Adds _sanitize_test_rows_legacy() to compute boot/test summaries from legacy rows (while builds are still handled by the builds-specific query).
• Logs when the fallback path is triggered to aid debugging.

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[Copilot]

Pull request overview

Copilot reviewed 3 out of 3 changed files in this pull request and generated no new comments.

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