Size field for StateVersion struct

[shaunakone]

Description

Adds a Size field to the StateVersion struct to expose state size metadata returned by the API.

This enables consumers of go-tfe to access the state size without additional API calls.

Testing plan

• Existing unit tests pass.
• Change is a non-breaking struct field addition.
• No acceptance tests were added or required for this change.

External links

• GitHub Issue: Add Size field for StateVersion #1274

Output from tests

[hashicorp-cla-app]

All committers have signed the CLA.

[datadog-terraform-cloud-hashicorp]

⚠️ Tests

✨ Fix all issues with Cursor

⚠️ Warnings

❄️ 2 New flaky tests detected

TestPlanExportsDownload_RunDependent from plan_export_integration_test.go (Datadog) (Fix with Cursor)

Could not read run "run-KykwHpx179Vfrppc": context deadline exceeded

TestPlanExportsDownload_RunDependent from github.com/hashicorp/go-tfe (Datadog) (Fix with Cursor)

Failed

=== RUN   TestPlanExportsDownload_RunDependent
    helper_test.go:1583: Polling run "run-KykwHpx179Vfrppc" for status included in ["cost_estimated" "errored"] with deadline of 2026-02-10 22:13:19.571532616 +0000 UTC m=+122.954791249
    helper_test.go:1589: ...
    helper_test.go:1680: Reading run "run-KykwHpx179Vfrppc"
    helper_test.go:1595: Run "run-KykwHpx179Vfrppc" had status "pending"
    helper_test.go:1589: ...
    helper_test.go:1680: Reading run "run-KykwHpx179Vfrppc"
    helper_test.go:1595: Run "run-KykwHpx179Vfrppc" had status "pending"
...

ℹ️ Info

🧪 All tests passed

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[Maed223]

Nice work 💯

[github-actions]

Reminder to the contributor that merged this PR: if your changes have added important functionality or fixed a relevant bug, open a follow-up PR to update CHANGELOG.md with a note on your changes.