Route Cypher CALL through physical dispatch - #1458

Summary

Fixes #1455.

This inventories the remaining D5 compat fallback routes and makes the CALL route decision concrete:

• Adds a native procedure_call physical route via ProcedureCallExecutorWrapper.
• Dispatches top-level Cypher CALL through physical planning, then execute_cypher_call() plus the existing chain continuation.
• Removes the exception-driven CALL compat fallback and adds a fail-fast guard if a procedure call reaches _execute_compiled_query_compat_non_union().
• Documents intentionally retained logical_plan is None fallback families for top-level OPTIONAL MATCH and optional reentry.
• Adds route guard tests for CALL bypassing compat and deferred fallback shapes still using compat intentionally.

Route Matrix

Validation

• python3 -m pytest -q graphistry/tests/compute/gfql/test_physical_planner.py graphistry/tests/compute/gfql/test_runtime_physical_cutover.py -> 16 passed
• python3 -m pytest -q graphistry/tests/compute/gfql/cypher/test_lowering.py -k "not cudf and (logical_plan_route or compile_cypher_call_returns_procedure_program or string_cypher_executes_graphistry_call)" -> 32 passed, 2 skipped
• python3 -m pytest -q graphistry/tests/compute/gfql/cypher/test_lowering.py -k "not cudf" -> 936 passed, 12 skipped, 111 deselected
• ./bin/ruff.sh ...changed files... -> green
• git diff --check -> clean
• ssh dgx-spark RAPIDS 25.02 GFQL package suite -> 2357 passed, 22 skipped, 15 xfailed
• ssh dgx-spark RAPIDS 26.02 GFQL package suite -> 2357 passed, 22 skipped, 15 xfailed

Local note: direct ./bin/test-minimal-lite.sh cannot start here because the shell only has python3; reran with a temporary python PATH shim. Local broad sentinel still hits no-CUDA cuDF/CuPy/UMAP paths, so cuDF validation was completed on DGX.

Review Skill

Review protocol artifacts are local under plans/d5-compat-fallback-inventory-1455/:

• research/context.md
• research/policies.md
• research/credentials.md
• waves/wave-1/wave-report.md
• waves/wave-2/wave-report.md
• final-report.md

Result: two clean/no-advance waves; no BLOCKER or IMPORTANT findings remain.

Sibling TCK

• graphistry/tck-gfql sibling PR fix(plotter): respect client_protocol_hostname for full_url #122 is now closed as empty because current tck-gfql/main already contains the needed rebaseline.
• The matching tck-gfql branch still exists and points at current main, so pygraphistry PR CI resolves cleanly.
• Reran the stale failed tck-gfql push-run check; current Route Cypher CALL through physical dispatch #1458 check rollup is green.