[hood]

Closes #2241

Summary

• entry.cache is created on first use (get_cache(self)). Resolving sets it back to nil instead of calling clear(), which has the same effect.
• entry.resolved_callbacks is created on the first resolve call.
• _get_word calls the uncached _get_overwrite while the entry is being built, so items with a textEdit don't create the cache straight away. It's a cheap pure calculation from insert_range and the context.
• cache.new shares one metatable across all instances.

match_cache is still created up front, since every entry is matched.

Data

CPU time, best of 15–20. Benchmark in #2236.

Metric	Before	After
entry.new x20k, label only	30.2 ms	26.2 ms (-13%)
entry.new x20k, with textEdit	34.0 ms	28.6 ms (-16%)
Building entries, 6k items, isIncomplete	153.7 ms	131.9 ms (-14%)

Compatibility

entry.cache and entry.resolved_callbacks are now nil until first used. Nothing in this repo reads them directly, and a GitHub code search found no external plugins that do.

Testing

All 73 specs pass, luacheck reports 0 warnings, and touched files are formatted with stylua.

[hrsh7th]

thank you