rename: IndexDef::space_id -> table_id
Summary
- rename: IndexDef::space_id -> table_id
Follow-up for bfe08313, !741 (merged), #396 (closed)
Also fix some docstrings
Ensure that
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New code is covered by tests -
API is documented -
Changelog is up to date -
(if Lua API changed) Lua API version is bumped inluamod.rs
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(if necessary) A follow-up doc issue is created in picodata/docs and linked here