chore(gfql): shrink predicate ast helpers - #1603

Summary

Closes part of #1058.

GFQL implementation shrink in the requested paired audit surface:

• DRY repeated scalar/temporal comparison predicate dispatch in graphistry/compute/predicates/comparison.py
• DRY regex string predicate constructor/call/validation scaffolding shared by match() and fullmatch()
• DRY AST predicate-aware filter-dict serialization shared by node and edge wire output

No public predicate helper names, predicate JSON wire shapes, route names, compiler-plan dispatch, structured errors, schema hooks, remote hooks, or validate='autofix' semantics changed.

Audit Notes

• graphistry/compute/ast.py and graphistry/compute/predicates/ do not contain Arrow conversion or validate='autofix' paths; feat(arrow): add opt-in mixed type coercion #1591/fix(arrow): preserve nulls in validate autofix #1598 did not create dead Arrow code in these files.
• No is_not_in implementation exists in the target files, so there is no is_in / is_not_in duplicate body to collapse here.
• numeric.py and comparison.py overlap by predicate name, but both are reachable/public with different ownership: numeric.py remains used by direct AST/filter validation paths, while comparison.py remains used by Cypher lowering and temporal/string comparison support. This PR does not collapse those public modules.

LOC Buckets

• Production: +68 / -169, net -101
  • graphistry/compute/ast.py: +12 / -20, net -8
  • graphistry/compute/predicates/comparison.py: +29 / -72, net -43
  • graphistry/compute/predicates/str.py: +27 / -77, net -50
• Tests / fixtures / baselines: +0 / -0, net 0
• Comments / docs / changelog: +1 / -0, net +1

Compiler-plan surface touched: no. The AST edit is a private serialization helper extraction that preserves existing node/edge wire JSON.

Validation

• python3 -m pytest -q graphistry/tests/compute/predicates/test_comparison_strings.py graphistry/tests/compute/predicates/test_comparison_conformance.py graphistry/tests/compute/predicates/test_str.py graphistry/tests/compute/predicates/test_numeric.py graphistry/tests/test_compute_chain.py
  • 161 passed, 96 skipped
• ./bin/ruff.sh graphistry/compute/ast.py graphistry/compute/predicates/comparison.py graphistry/compute/predicates/str.py
  • passed
• ./bin/typecheck.sh graphistry/compute/ast.py graphistry/compute/predicates/comparison.py graphistry/compute/predicates/str.py
  • passed
• python3 -m pytest -q graphistry/tests/test_schema_artifacts.py graphistry/tests/test_viz_settings.py
  • 11 passed
• python3 -m graphistry.devschemas.export --check
  • passed, no schema drift
• git diff --check
  • passed
• Local broader predicate/GFQL run:
  • 305 passed, 96 skipped
  • one cuDF-only failure at cudf.Series(...) with cudaErrorNoDevice because this host has cuDF installed without a CUDA device
• DGX RAPIDS 26.02:
  • RAPIDS_VERSION=26.02 PROFILE=gfql TEST_FILES="graphistry/tests/compute/predicates/test_str.py graphistry/tests/compute/predicates/test_comparison_conformance.py graphistry/tests/compute/predicates/test_temporal_values.py" docker/test-rapids-official-local.sh
  • 181 passed, 4 skipped
• DGX RAPIDS 25.02:
  • same focused predicate target set
  • 181 passed, 4 skipped, with the known 25.02 driver-version warning from the RAPIDS image

Coordination

• Stayed within graphistry/compute/predicates/ and graphistry/compute/ast.py, plus CHANGELOG.md.
• feat(schemas): export tooling contract artifacts #1590 JSON Schema exporter/checker still passes with no drift.
• feat(settings): expose public viz settings contracts #1587 settings-contract tests still pass.
• No auto-merge requested or performed.