Contact event vector and actual feedback ledger

RE-719. Reproduce with python3 scripts/analyze_qvm_contact_feedback.py; check with python3 scripts/test_qvm_contact_feedback.py. The machine report retains source identity and bounded fixtures.

Actual293222–293361 fills event104/108/112 with forward36477748×word1140457472 (500), truncating each component to integer and converting back to float. Weapon27 overwrites that vector with exact muzzle36477712 bytes. Enabled-mode same-team contacts with both clients skip feedback; otherwise only event204>0 calls285142. Recovered285142 independently requires an attacker client, signed target ID0–64 inclusive and actual33715 enabled mode; it adds the encoded integer to client2520+8×ID and writes current time to the following word. Detached ID fixtures are explicit boundary inputs. Event construction and health damage are outside this slice; no feedback outcome is supplied.

No original executable/full QVM/native collision/physics/rendering executes. Native responses and legal input domains are supplied or unverified where stated; full runtime/macOS/Linux Rust/Bevy/Solari gameplay remains open.