feat(opy): complete source semantic and project state convergence

[e54-bot]

Summary

• complete source-semantic player-variable receivers for eventPlayer, hostPlayer, attacker, and victim with HIR provenance and structured invalid-member diagnostics
• extract the single project settings block from included sources, preserve its source file identity, and ignore duplicate includes after first processing
• refresh real-world corpus expectations to the next independently owned boundaries

Verification

• cargo fmt --all -- --check
• cargo test --workspace --all-targets
• full corpus: 63 fixtures, 43 match / 17 known-gap / 3 unsupported, zero regression
• focused negative coverage for unknown player members and non-assignable context receivers

Fixes #142
Fixes #143

[Teakowa]

Major — crates/opy-rs/src/lower.rs:1349

Player-variable member lowering is still limited to the four hard-coded context names. #143 explicitly requires the receiver/source-variable contract for all valid player expressions. The reference parser treats any non-call member whose name is a player variable as __playerVar__(parse(receiver), name); e.g. a declared globalvar target followed by target.isWeaponBroken is a player-variable access, while this code falls through to HirExpr::Member (and non-Name receivers still become unsupported-member).

Resolve declared/default player-variable members independently of receiver shape, preserving the lowered receiver and member provenance.

[Teakowa]

LGTM