fix(install): treat dev-reference shifts as upgrades

Composer's Transaction fires an UpdateOperation when an installed
package's source/dist reference moved, even if the version string is
unchanged — that is how a `dev-main#abcd` root require pinning a new
commit propagates through `composer install`. Mozart was checking only
(name, version) and short-circuiting to Skip, so the package stayed
pinned to whatever reference installed.json carried.

Compare references in compute_operations and route mismatches into
Action::Update. The trace recorder needs the from-side display string
to include the reference suffix (`dev-master abc123`) so the EXPECT
output matches Composer's UpdateOperation::format; thread that through
PackageOperation::Update as a separate from_full_pretty field while
keeping from_version (sans suffix) for the upgrade-vs-downgrade
direction check, which has to compare normalized versions like
Composer's VersionParser::isUpgrade does.

Unblocks update_reference, update_reference_picks_latest, and
updating_dev_updates_url_and_reference installer fixtures.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

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