fix(codecov): populate branch/condition data in Clover reports

[rossaddison]

Closes #334.

What was wrong

CloverReport hardcoded conditionals/coveredconditionals to 0 at both file and project level, and never read FileCoverage::$functions at all — even when branch data was genuinely collected (CoverageLevel::Branch/Path via XdebugDriver). Confirmed by contrast with CoberturaReport in this same package, which already consumes that data correctly (branch-rate, condition-coverage).

What this does

• BranchCoverageAggregator (new, @internal): extracts CoberturaReport's own countBranches()/buildLineBranchMap() into a shared helper, per the suggested scope in the issue, so both report writers reduce FileCoverage::$functions the same one way instead of drifting.
• CloverReport: now populates conditionals/coveredconditionals (file and project level) from countBranches(), and folds them into elements/coveredelements alongside statements — mirroring how php-code-coverage's own Clover writer sums methods + statements + branches into elements.
• Per-line output: a line that's a genuine branch decision point (≥2 outgoing edges, from buildLineBranchMap()) now writes type="cond" with truecount/falsecount instead of type="stmt"; ordinary statement lines are unaffected. Since a branch can have more than 2 outgoing edges (a match arm per case), truecount/falsecount are populated as covered/uncovered edge counts rather than a literal true/false pair — documented inline.
• Tests: 5 new cases in CloverReportTest — conditionals/coveredconditionals filled from branch data, elements including them, a per-line type="cond" case with truecount/falsecount, a single-outgoing-edge branch staying type="stmt" (not a decision point), and the "no branch data at all" Line-level shape keeping every zero at zero (per the issue's explicit ask).

Verification

• vendor/bin/testo --suite=Codecov/Unit: 136/136 (up from 131).
• composer psalm: no errors.
• composer cs:diff: 0 of 4 touched files need fixing.
• composer rector:ci (dry-run against the touched files): no changes.
• Full suite under TESTO_CI=1: 2211/2211, excluding 3 pre-existing, unrelated Tests\Bench\Self\BenchAttr timing-sensitive failures reproduced identically on a clean checkout of 1.x before this change.

Assisted-By: Claude Sonnet 5 noreply@anthropic.com

[roxblnfk]

Pushed a follow-up commit (e7e4af4) on top of yours with a few review tweaks, so the PR can be merged as is:

• conditionals / coveredconditionals at file and project level are now summed from buildLineBranchMap() instead of countBranches(). Only decision points count, so the file metrics equal the sum of truecount + falsecount over the cond lines, and single-edge linear jumps no longer dilute condition coverage. Cobertura keeps countBranches() for branches-valid, its semantics are unchanged.
• cond lines no longer carry the count attribute, the Clover schema defines it for stmt only.
• Comments trimmed to the constraints, #[Covers(CloverReport::class)] added on the test class, Assert::false() instead of Assert::same(isset(), false).

Thanks for the clean port and the tests, the aggregator extraction is exactly what was needed.

[codecov]

Codecov Report

❌ Patch coverage is 96.07843% with 2 lines in your changes missing coverage. Please review.

Files with missing lines	Patch %	Lines
.../codecov/src/Internal/BranchCoverageAggregator.php	90.00%	2 Missing ⚠️

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