docs(spec): redefine processkit v1 from first principles

[projectious]

Objective

Define a coherent baseline for a clean Processkit v1 implementation from first principles.

Updated decisions

• accept Python 3.12+ as the sole application language with one CLI/MCP application core
• replace the mandatory 89-concept ontology with a small repository-memory kernel plus optional first-party packages
• retain the 89 concepts as a disposition inventory rather than a universal release gate
• initially reuse only the smallest fitting semantics: Dublin Core Terms for generic metadata and W3C PROV for provenance where meanings fit
• defer general RDF, JSON-LD, OWL, SHACL, and knowledge-graph export work
• preserve v0/alpha learning through a capability disposition matrix and black-box fixtures, not source-code reuse

Validation

• scripts/validate-v1-spec.py: valid roadmap, links, dependency graph, and 412 unique normative requirements
• git diff --check

Review focus

Please review the provisional kernel, optional-package boundary, minimal semantic-standard reuse, accepted Python architecture, and v0 capability-disposition requirement.