fix(release): build the debug artifacts before the packaging script tests

[donislawdev]

The first tagged release of 0.2.0 failed in phase A, on a fault this repository
had already found twice and fixed once - in the wrong place.

What broke

cargo test compiles chrono-hook as a test harness and never lands the
cdylib, so target/debug/chrono_hook.dll does not exist and the probe that
drives a real session fails:

this probe drives a real session and needs ...\target\debug\chrono_hook.dll,
which `cargo test` does not build

It fails on a clean machine only - a developer box still carries one from an
earlier build - so nothing local ever showed it. CI was taught to run
cargo build --workspace first. packaging/build-dist.ps1 was not, and phase A
of a release calls that script.

The guard was green beside the failure

The guard that exists for exactly this read one file. It asserted the ordering
in .github/workflows/ci.yml, passed, and was sitting green in the same test
binary as the failure. A guard that watches one of two doors reports on the
door, not on the house.

It now walks a list of every committed file that runs the workspace tests and
names the file it is unhappy with. tools/gates.ps1 is deliberately not on that
list: it lives outside the repository, so a clean clone could not read it and
the test would fail for the wrong reason. Renamed to carry the scope it now has.
Nothing is added or removed, so the Rust suite stays at 453.

Evidence

• The revert probe was seen red before the fix went in, and it named
  packaging/build-dist.ps1 in the failure message rather than only counting.
• Measured rather than assumed. With target/debug/chrono_hook.dll deleted,
  cargo test does not bring it back and cargo build --workspace does.
• Gates: 14/14 in 198.4s - Rust 453, C# 449, harness 146 PASS / 0 FAIL on
  x64 and x86.

Honest limit

This removes the known cause. The release ritual has still never run to
completion, so the phase A steps after this one - attestation, opening the
draft, handing over the artifact - remain untested in anger.

🤖 Generated with Claude Code