feat(m-decomp): constraint upgrade

[csbobby]

M-Decompose Upgrade

Constraint Extraction and Validation

Description

• Constraint extraction refactored into a normalize-then-parse pipeline
  Added whitespace canonicalization, separator unification, and newline-aware block segmentation to eliminate layout- and order-sensitive parsing failures. Produces stable constraint IDs and consistent downstream bindings, significantly improving subtask–constraint determinism and template reproducibility.
• Introduced an explicit validation-decision stage
  Inserted between constraint extraction and code generation, emitting a constraint to validation-type mapping (e.g., llm / code). Validation strategy is now a first-class, inspectable, template-addressable feature, enabling different generation paths per constraint type.
• Validation code generation turns constraints into executable checking
  The validation_code_generator binds each constraint to a generated function stub in the V2. The CLI output shifts from a descriptive decomposition result to an importable, runnable validation module, allowing downstream systems to call validations directly and removing manual reinterpretation.

[github-actions]

The PR description has been updated. Please fill out the template for your PR to be reviewed.

[mergify]

Merge Protections

Your pull request matches the following merge protections and will not be merged until they are valid.

🟢 Enforce conventional commit

Wonderful, this rule succeeded.

Make sure that we follow https://www.conventionalcommits.org/en/v1.0.0/

• title ~= ^(fix|feat|docs|style|refactor|perf|test|build|ci|chore|revert|release)(?:\(.+\))?:

[jakelorocco]

Please make sure to run the pre-commit hooks. There's some formatting issues scattered throughout the PR.

I also worry that this is continuing the trend of the decompose module not being melleaic (mostly that it doesn't use components for templating). But I guess it doesn't worsen the problem, so I'm just flagging it now for future consideration.

[csbobby]

:) The fixes are done @jakelorocco.