Release 1.1.0: CI quality gates, fuzzing, and runtime refactor

[Matographo]

Summary

• Add local and CI quality gates: 85% coverage, clang-tidy (analyze/lint/security), ASan/UBSan/TSan, libFuzzer with regression replay, benchmark regression gate, and packaging smoke (binary, ReqPack, Docker).
• Introduce make ci-fast for full validation without fuzzers; harden fuzz harnesses and YAML/parser I/O for sanitizer stability.
• Reorganize template lexer/parser and runtime into maintainable modules; expand correctness, security, portability, and concurrency test coverage.

Test plan

• make ci-fast passes locally (493 tests, static analysis, sanitizers, packaging smoke)
• make ci-full / fuzz regression verified on branch
• CI green on all matrix jobs after merge
• Tag v1.1.0 on main triggers release artifacts (tar.gz, zip, ReqPack, Docker)

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