🤖 Clear Gloas payload received on reset

[dapplion]

Links audit/review artifact: #100

Implements GLOAS-02 from the audit:

• set_all_blocks_to_optimistic now clears V29 payload_received in addition to resetting V17 execution statuses.
• Adds a regression test that sets payload_received through the live envelope path and verifies reset clears it.

Validation run locally:

• cargo fmt --package proto_array
• cargo test -p proto_array set_all_blocks_to_optimistic_clears_payload_received --lib
• cargo check -p fork_choice
• git diff --check