fix(r8-tests): Fix retrace line handling for edge cases

[romtsn]

• Preserve original line info for no‑range mappings and refine no‑line/line‑range selection to match R8 behavior
• Make stacktrace parsing more permissive for colon filenames and empty line suffixes
• Align mapper/cache behavior (queueing + selection) and update line‑number fixtures / edge‑case tests and notes
• Bump PRGCACHE version because we need to invalidate caches since we use a new sentinel value (u32::MAX) to distinguish from an explicit 0:0 minified range

[loewenheim]

I haven't studied the logic in detail yet, but does using u32::MAX as a placeholder require invalidate old caches?

[romtsn]

does using u32::MAX as a placeholder require invalidate old caches?

I believe so, so we probably have to bump the cache version, good point!

[romtsn]

Updated to also Bump proguard cache version

[romtsn]

closing in favour of a chain of PRs (#82 - #87)