fix(datasource-mongo): fix flaky create integration test

[Scra3]

Summary

• Await connection.dropDatabase() (was fire-and-forget, causing race condition)
• Add explicit await Movie.createCollection() before saving data

The test was flaky because MongoDB introspection could run before the collection existed, resulting in "Collection 'movies' not found" with an empty collection list.

Matches the pattern already used in index.integration.test.ts.

Test plan

• Fix matches working pattern from index.integration.test.ts

🤖 Generated with Claude Code

Note

Fix flaky beforeEach setup in MongoDB create integration tests

Awaits the dropDatabase call and adds an awaited createCollection call before seeding the Inception document in the beforeEach hooks of create.integration.test.ts and index.ssh.integration.test.ts. This ensures the database is fully dropped and the Movies collection exists before each test runs, eliminating a race condition that caused intermittent failures.

^{Macroscope summarized 13a37b7.}

[qltysh]

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