Partially backport only the `get_hist()` exception catch from
0846cbd4a4, authored by goodboy
<goodboy_foss@protonmail.com>. Keep the existing gap fallback.
A timed-out IB query raises `NoData` from null-segment repair.
Letting it escape cancels sibling history and live quote tasks
while `pikerd` can remain alive. Catch `NoData` and
`DataUnavailable` locally and stop querying this repair pass.
Add a regression using real null detection and a waiting sibling
in the same nursery. Both provider failures must return without
canceling the sibling. The two cases failed before this catch;
the focused history files passed 17 tests with it.
Partial-backport-of: 0846cbd4a4
Prompt-IO: ai/prompt-io/20261106T185628Z_495c0915_215e9b_prompt_io.md
(this patch was generated in some part by `codex` (`openai`))
- let structured nursery joins own child-task completion
- stop empty provider frames before timestamp endpoint indexing
- cover provider exhaustion and empty frames with bounded tests
Prompt-IO: ai/prompt-io/opencode/20260722T001358Z_16f3cd6f_prompt_io.md
(this patch was generated in some part by `opencode` using `gpt-5.6-sol` (`openai`))
(cherry picked from commit 931f22d235)
Gud Boi