feat(rds): add aws_s3 postgres extension (table_import / query_export)

[vieiralucas]

Summary

• Add Aurora-postgres-compatible aws_s3 extension: aws_s3.table_import_from_s3 and aws_s3.query_export_to_s3 (positional + aws_commons._s3_uri_1 composite overloads).
• Bump aws_commons to 1.1 with the _s3_uri_1 type and create_s3_uri() constructor, plus a 1.0->1.1 upgrade script.
• Two new bridge endpoints (/_fakecloud/rds/s3-import, /_fakecloud/rds/s3-export) wired straight into the in-memory S3 state.
• Bake the new extension files into the prebuilt fakecloud-postgres image.

Test plan

• cargo clippy --workspace --all-targets -- -D warnings
• cargo fmt --all
• cargo test -p fakecloud-rds
• cargo test -p fakecloud-e2e --test rds_aws_s3 (Docker required — runs in CI)

---

Summary by cubic

Adds the RDS PostgreSQL aws_s3 extension so SQL can import from and export to S3. Also adds server bridges and upgrades aws_commons to 1.1; the extensions are baked into the prebuilt fakecloud-postgres image.

• New Features

  • aws_s3.table_import_from_s3 and aws_s3.query_export_to_s3 (positional and aws_commons._s3_uri_1 overloads via aws_commons.create_s3_uri()).
  • New bridges: /_fakecloud/rds/s3-import and /_fakecloud/rds/s3-export (read/write in-memory S3).
  • Prebuilt image now includes aws_commons 1.1, aws_lambda, and aws_s3.
  • E2E test covers S3 → table import → query export → S3, uses a scratch table for the composite import to keep the export deterministic; docs and README updated.

• Migration

  • If you have aws_commons 1.0 installed, run: ALTER EXTENSION aws_commons UPDATE TO '1.1' before using aws_s3.

^{Written for commit 3880c77. Summary will update on new commits. Review in cubic}

[cubic-dev-ai]

1 issue found across 13 files

Prompt for AI agents (unresolved issues)

Check if these issues are valid — if so, understand the root cause of each and fix them. If appropriate, use sub-agents to investigate and fix each issue separately.


<file name="crates/fakecloud-e2e/tests/rds_aws_s3.rs">

<violation number="1" location="crates/fakecloud-e2e/tests/rds_aws_s3.rs:118">
P2: Importing the CSV into the same table a second time changes the data used by the export step. Use a scratch table for the composite overload (or export before the second import) so the exported rows stay deterministic.</violation>
</file>

_{Reply with feedback, questions, or to request a fix. Tag @cubic-dev-ai to re-run a review.}

[codecov]

Codecov Report

❌ Patch coverage is 0% with 126 lines in your changes missing coverage. Please review.

Files with missing lines	Patch %	Lines
crates/fakecloud-server/src/main.rs	0.00%	121 Missing ⚠️
crates/fakecloud-rds/src/runtime.rs	0.00%	5 Missing ⚠️

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