Keep incoming provider frames strict while dropping non-positive rows
from persisted history before merge validation.
This lets known-bad MNQ history repair itself on the next valid IB
frame without losing valid old bars or publishing noncanonical indexes.
Prompt-IO: ai/prompt-io/opencode/20260728T232718Z_ed85721c_prompt_io.md
(this patch was generated in some part by `opencode` using `gpt-5.6-sol` (`openai`))
Gud Boi