chore(deps): batch patch-level go and ui dependency bumps

Batched low-risk patch/minor bumps from open dependabot PRs on the github mirror, so they can be merged in one go and the corresponding PRs closed.

Go (engine/go.mod):

• gorilla/mux 1.8.0 -> 1.8.1 (dependabot#329)
• aws-sdk-go-v2/config 1.32.12 -> 1.32.14 (dependabot#333)
• aws-sdk-go-v2/service/rds 1.113.1 -> 1.117.1 (dependabot#338)
• testcontainers-go 0.40.0 -> 0.41.0 (dependabot#336)
• jackc/pgx/v5 5.7.5 -> 5.9.1 (dependabot#335)

UI (ui/packages/{ce,shared}):

• formik 2.2.9 -> 2.4.9 (dependabot#330)
• prettier 2.4.1 -> 2.8.8 (dependabot#332)
• react-syntax-highlighter 15.5.0 -> 15.6.6 (dependabot#334)
• @types/react-syntax-highlighter 15.5.6 -> 15.5.13
• eslint-plugin-cypress 6.1.0 -> 6.2.2 (dependabot#337)
• vite 6.3.2 -> 6.4.2 (dependabot#339)

pgx 5.7.5 -> 5.9.1 notes: v5.9.0 requires Go 1.25+ (engine is on 1.26). No SendBatch/Pipeline usage in engine/, and database/sql uses the lib/pq driver, not pgx/v5/stdlib, so the v5.8.0 ResetSession and v5.9.0 pipeline-error changes don't apply.

Excluded:

• @types/node 12.20.33 -> 12.20.55 (dependabot#331). Node 12 has been EOL for 3 years; bumping a stale type within an EOL major papers over the real fix. Tracked separately in #698.

Verified: make build, make test, make run-lint, pnpm test (ce), pnpm build (ce), pnpm run lint (ce) all green.