Refactor recipe index caching and improve mixin reflection handling

[cryolithic]

Running this mod in All The Mods 10 with some large recursions was causing me to timeout at login. Made a large fix performance wise, while cleaning up a few other things with claude. Tested on my personal server.

Performance
===========

Measured on an All the Mods 10 server: 44,798 crafting recipes, 11 pattern
providers and assembler matrices, ~23,100 generated dependency patterns per
full round.

The old path traversed the whole recipe list twice over. getAllRecipesFor is
List.copyOf(byType), so every recursion copied all 44,798 entries, and every
distinct input item then drove another full linear scan with a getResultItem
call per entry. A complete round across the network works out to roughly
23,100 full copies plus ~58,000 full scans, on the order of 3.6 billion recipe
visits.

Version 1.0.7

[09Aug2026 11:02:58.739] Generated 61 dependency patterns for Assembler Matrix Pattern
[09Aug2026 11:03:02.071] Generated 364 dependency patterns for Assembler Matrix Pattern
[09Aug2026 11:03:50.396] Generated 2614 dependency patterns for Assembler Matrix Pattern
[09Aug2026 11:03:50.774] Generated 43 dependency patterns for Assembler Matrix Pattern

Four providers spanning ~52 seconds; the 2,614-pattern matrix alone took ~48.
Extrapolated to all 11 providers, a full round is six to seven minutes of
server-thread time, repeated on every pattern insertion or removal.

1.0.8 changes

[10Aug2026 11:36:52.822] Indexed 44798 crafting recipes by output item in 37 ms
[10Aug2026 11:36:52.935] Generated 3231 dependency patterns for Assembler Matrix Pattern
[10Aug2026 11:36:52.987] Generated 61 dependency patterns for Assembler Matrix Pattern
[10Aug2026 11:36:52.998] Generated 364 dependency patterns for Assembler Matrix Pattern
[10Aug2026 11:36:53.077] Generated 2751 dependency patterns for Assembler Matrix Pattern
[10Aug2026 11:36:53.097] Generated 43 dependency patterns for Assembler Matrix Pattern
[10Aug2026 11:36:53.199] Generated 2711 dependency patterns for Assembler Matrix Pattern
[10Aug2026 11:36:53.291] Generated 3083 dependency patterns for Assembler Matrix Pattern
[10Aug2026 11:36:53.376] Generated 2530 dependency patterns for Assembler Matrix Pattern
[10Aug2026 11:36:53.450] Generated 2581 dependency patterns for Assembler Matrix Pattern
[10Aug2026 11:36:53.615] Generated 2649 dependency patterns for Pattern Provider

Ten providers and 20,004 patterns in 793 ms end to end, including the one-time
37 ms index build. Like for like, the 2,614-pattern matrix at ~48 s becomes a
2,751-pattern matrix at 79 ms, about 600x. The index is built exactly once per
server session and shared by every provider, so the margin widens as more
providers are added rather than shrinking.