2026.08.22 - DCP Reliability Troubleshooting - Phase 3: Native Glob Semantics

[lanhhoang]

• Replace the hand-written glob compiler with node:path.posix.matchesGlob, so every protected tool and file pattern supports character classes like [abc] and [0-9] alongside *, **, and ?, while preserving the existing / separator contract (src/strategies/protected-patterns.ts).
• Route compression-summary preservation through the shared matcher via isToolNameProtected() (src/compress/protected-content.ts).
• Route dcp:sweep through the shared tool and file predicates, so protectedFilePatterns keeps its documented "never pruned" contract during sweep (src/strategies/runner.ts).
• Lock down the native POSIX contract with regression coverage for character classes, malformed patterns, regex punctuation, POSIX separator behavior, compression protected-tool patterns, and sweepAll protected-tool and protected-file patterns (tests/protected-patterns.test.ts, tests/protected-content.test.ts, tests/strategy-runner.test.ts).
• Update the schema and README to state Node POSIX glob semantics for protected tool and file patterns (src/config-schema.ts, README.md, dcp.schema.json).