docs: update profile pilot source paths

[andrewboudreau]

Summary

• update two stale source paths introduced by Add actor profile reconstruction pilot #2127
• restore the required dead-reference gate on main

Validation

• python tools/check_dead_references.py
• git diff --check
• pre-push hooks: port references, duplicate sources, 98/98 TU compile

[tangos-validator]

✅ PR validation — Passed

noverify: no source/build-data changes in this PR

_{Each changed src/*.c|*.cpp is compiled and its relocated bytes compared to the binary data on a private build box. Passing requires every changed file to reproduce the ROM byte-for-byte with correct relocation targets — this catches WRONG-DEST relocations and non-reproducing near-misses that ledger-scoped linkcheck skips.}