v0.7.0

Added

• Spans on static method/member/argument identifiers in the AST (php-ast, #197).
• Named argument ordering and uniqueness validation: duplicate names and non-trailing named arguments now produce diagnostics (php-rs-parser, #193).
• Name::src_repr(&self, src: &'src str) -> &'src str — zero-alloc slice into source for any name shape (php-ast, #169).

Changed (breaking)

• ScopeWalker::new now requires the source string (src: &'src str) to support zero-alloc namespace resolution. Update call sites to pass result.source or your source buffer (#169).
• Scope now derives Copy; Scope::namespace changed from Option<Cow<'src, str>> to Option<&'src str> (#169).
• ArenaVec::len and ArenaVec::last explicit methods removed — both remain accessible via Deref<Target=[T]> and continue to work without call-site changes (#170).

Performance

• ScopeWalker namespace tracking is now zero-alloc; scope saves/restores are a free word copy (#169).
• Printer internal strings changed from heap-allocated String to &'static str (#164).
• Lexer heredoc label now borrows from source instead of allocating a String (#163).

Fixed

• Guard against silent u32 truncation for source files larger than 4 GB in the lexer (#166).
• Eliminated panic-prone unwrap() calls after explicit length checks in the parser (#165).
• Replaced bare unreachable!() calls with descriptive messages and Option returns in the parser (#167).
• Removed dead ParseError::Unexpected variant from diagnostics (#168).
• Variable name extraction now guarded against empty-span tokens (#160).