Count a Rust function passed by path as used by the file that passes it

[tauanbinato]

A file's outline tells Jev which other files use each member (used_by). Before this, JevGate counted only calls. A Rust function passed by path was invisible: compose::unconfirmed_units in follow_ups(plan, files, compose::unconfirmed_units) is not a call. So JevGate's own compose.rs listed follow_ups.rs as the user of only 3 of the 8 follow-up selectors, which was the evidence a blind labeler used to call it a review-level split.

The change.

• While reading a Rust function, JevGate records the functions it names by path where the path is a value, not the callee of a call: compose::unconfirmed_units, Self::helper, module::f.
• The name must start in lower case, because Rust names types, variants and constants in upper case (Outcome::Clear, catalog::FILE_ORGANIZATION). Paths inside use or inside a longer path don't count.
• They go into a new Unit::passed. Only the callers map reads it, so the member calls sent in outlines, the callees sent in rechecks and the security traces don't change.
• Other languages are unchanged: passed stays empty outside .rs files.
• FILE_ORGANIZATION rule version is now 23.

Measured:

• JevGate before the splits (0.23.1's tree): compose.rs now lists all 8 selectors as used by follow_ups.rs. Its first split answer moved from 0.75 to 0.80 on middle plus top, so the outline is a consider, where 0.24.0 cleared it through the kind of file. The group it names is still the large mixed one, so the location is weak.
• Corpus, the 26 Rust projects, under one pinned calibration against 0.24.0: 37 outline requests were asked again (about $0.008).
  • own-fenrok-online's studio/src/server/convert.rs: review became a consider. It was labeled wrong as a review: one job, laid out in sections.
  • zoxide's src/util.rs: consider became a review. It was labeled right: a grab bag of helpers.
  • One unit each in own-spacevox and own-voltforge became undecided.
  • Nothing else changed.

Tests:

• The parser records unconfirmed_units and Self::name_of but not a call, a variant, or anything in a Python file.
• An outline names the file that passes selectors::warm0 as its user. This test fails without the change.

Clippy (also 1.98) and cargo +1.90.0 check --locked pass. The self-check with the default gate exits 0, with no review or consider.

Next: sending each candidate part's users with its part question (0.24.0's follow-up). "Used only by follow_ups.rs" is the kind of evidence that separates a part to move.