refactor(redmine-canon): re-export APP_PREFIX + render_classid from OGAR (one source of truth)

[AdaWorldAPI]

What

The Redmine-side twin of openproject-nexgen-rs#57: adopts the OGAR PR #97 surface in redmine_canon::app, replacing the two local mirrors with re-exports from ogar-vocab.

// before — local literal + local bit math
pub const APP_PREFIX: u16 = 0x0007;
pub const fn render_classid(concept: u16) -> u32 {
    ((APP_PREFIX as u32) << 16) | (concept as u32)
}

// after — re-exports from the typed OGAR surface
pub const APP_PREFIX: u16 = RedminePort::APP_PREFIX;             // #97 typed const
pub fn render_classid(concept: u16) -> u32 {
    ogar_vocab::app::render_classid_for::<RedminePort>(concept)  // #97 central comp
}

Keeps the two -canon ports byte-symmetric on the new OGAR surface: op-canon re-exports OpenProjectPort::APP_PREFIX (0x0001), redmine-canon re-exports RedminePort::APP_PREFIX (0x0007). One source of truth; drift between local and OGAR is now structurally impossible.

New tests (pin the re-exports)

• app_prefix_re_exports_the_typed_ogar_constant — APP_PREFIX == RedminePort::APP_PREFIX == 0x0007.
• render_classid_agrees_with_the_central_ogar_composition — for every concept, render_classid(c) == ogar_vocab::app::render_classid_for::<RedminePort>(c).

The low/high decomposition test now routes through ogar_vocab::app::app_of / concept_of (also #97) instead of local shifts.

#99 spellbook pre-flight (cleared)

Q	answer
Q1 reading FROM	OGAR static port alias + PortSpec::APP_PREFIX — no behavior.
Q2 lifecycle vocab	None.
Q3 target IR	Canonical OGAR (ogar_vocab::ports + ogar_vocab::app).
Q4 arrow direction	producer→OGAR→consumer. No SurrealQL in this PR.
Q5 inverse recover	N/A — no behavior.

Zero diagnostic signatures present.

Build

• Lockfile bumped: cargo update -p ogar-vocab → OGAR main (post-#97). No new/removed deps.
• Toolchain 1.95. cargo test -p redmine-canon → 22 unit + 5 doctests pass (was 20+5 in feat(redmine-canon): app module — pull OGAR via class (0x0007 twin of op-canon) #19).
• cargo fmt --check clean; cargo clippy -- -D warnings clean.

Cross-refs

• OGAR #97 — PortSpec::APP_PREFIX + ogar_vocab::app composition module.
• openproject-nexgen-rs #57 — the symmetric op-canon re-export (twin of this PR).
• This repo feat(redmine-canon): app module — pull OGAR via class (0x0007 twin of op-canon) #19 — the introductory redmine-canon::app module.

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