feat(realizer): extend to all 13 English v1 constructions
Engineer the deterministic realizer to handle negation, conjunction,
disjunction, embedded clauses, relative clauses, quantification, tense,
and aspect — covering all 13 grammatical-coverage v1 constructions.
- generate/morphology.py: rule-based English inflection (past, participle,
base form) for seed vocabulary predicates
- generate/templates.py: match-case inflection dispatch for tense/aspect/negation
- generate/graph_planner.py: add CONJUNCTION, DISJUNCTION, COMPLEMENT, RELATIVE
relations; add grammatical feature fields to ArticulationStep
- generate/realizer.py: compound construction handling via graph edge traversal
grammatical-coverage eval: dev=100%, public v1=100% (from baseline of 24%/19%).
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