feat(pipeline): Ensemble production topology routing pass for ObjectScript/IRIS

[isc-tdyar]

Adds pass_ensemble_routing — a pipeline pass that statically extracts InterSystems Ensemble/IRIS Interoperability production topology from ObjectScript .cls files at index time. No live IRIS instance required.

Closes #1061. Follows up on #467 (ObjectScript language support) — split out at reviewer request.

What it does

Pass A — EnsembleItem nodes: reads each EnsembleProduction class's ProductionDefinition XData block (XML), parses <Item Name="..." ClassName="..."> entries, and creates EnsembleItem nodes for each production component (business services, processes, operations).

Pass B — ROUTES_TO edges: for each EnsembleItem, reads the source .cls file and extracts routing rules referencing other components by class name, emitting ROUTES_TO edges. Uses segment-anchored matching (qn_ends_with_segment) to avoid false positives from partial class name matches.

WorkMgr dispatch: detects .Queue("##class(X).method", ...) calls and emits CALLS edges to the target method — the same static dispatch pattern as task queues in Celery/Airflow.

Changes from the version reviewed in #467

Per review feedback:

• Language gate: early-exits immediately if the project contains no ObjectScript files — zero overhead for non-IRIS projects
• Truncation logging: cbm_log_warn fires when MAX_ITEMS or MAX_SETTINGS caps are hit so silent truncation is visible in logs

Files changed

• src/pipeline/pass_ensemble_routing.{c,h} — new pass
• src/pipeline/pipeline.c — wired into run_predump_passes
• Makefile.cbm — added to SRCS

[DeusData]

Thanks for splitting the Ensemble topology pass from the base ObjectScript support. This is a 0.9.2-rc language enhancement. Review will focus on bounded parsing of embedded production XML, deterministic EnsembleItem identity, conservative ROUTES_TO matching, malformed-input handling, and representative IRIS fixtures without requiring a live server.