Fixes issue #10972 where _path_matches() used PurePath.full_match()/match()
which requires the entire path to match. Since fragment metadata stores
absolute paths (e.g. /app/.opencode/skills/SKILL.md) while project context
--exclude-path/--include-path settings produce relative globs (.opencode/*,
docs/*), include/exclude filters were silently ineffective.
Added _matches_any() static helper in execute_phase_context_assembler.py that:
- Tries full_match(pattern) as-is for relative paths and anchored patterns
- Auto-prefixes relative patterns with **/ so they match absolute paths
Updated _matches_pattern() in context_phase_analysis.py with same logic plus
zero-depth compatibility shim.
Added 7 new BDD regression scenarios with @tdd_issue tags:
- 5 in execute_phase_context_assembler_coverage.feature (absolute path matching)
- 1 extra trailing ** glob exclusion test
- 1 in project_context_phase_analysis.feature (phase analysis exclusion)
ISSUES CLOSED: #10972
HAL9000