Apply minor optimizations to scope parsing

[sirosen]

1. Don't build methods we don't need on an internal dataclass (ScopeTreeNode) by setting repr=False, eq=False, order=False for that class

2. Replace any(<containment checking generator>) with a regex search in Scope __post_init__.

(1) is barely measurable. I ran some timeit benchmarking on a simplified example and found that it improves import time by ~100μs (0.1ms) on python3.13.
It will take many import cycles for this to pay the time and energy cost of benchmarking it.
I share it partly as a bit of information learned: we can optimize dataclass definition time, but it's not going to offer a significant win today.

(2) should be noticeable. I observed improvements that were small but measurable in our existing benchmarks.
I also think the regex check is at least as readable as the generator expression it replaces.

[codspeed]

Merging this PR will improve performance by 12.19%

⚠️ Different runtime environments detected

Some benchmarks with significant performance changes were compared across different runtime environments,
which may affect the accuracy of the results.

Open the report in CodSpeed to investigate

⚡ 3 improved benchmarks
✅ 15 untouched benchmarks

Performance Changes

	Benchmark	BASE	HEAD	Efficiency
⚡	test_deeply_nested_object_encoding[1w-5d]	177.1 µs	155.9 µs	+13.58%
⚡	test_wide_scope_parsing[10000]	568.3 ms	509.6 ms	+11.52%
⚡	test_wide_scope_parsing[5000]	283.4 ms	254.2 ms	+11.48%

Tip

Curious why performance improved? Comment @codspeedbot explain why performance improved on this PR, or directly use the CodSpeed MCP with your agent.

---

_{Comparing sirosen:optimize-scope-construction (5920be6) with main (8ac1169)}