[Bug][multi-agent-shared-context]: 'Deprecated modules rebuilt' comparison row counts the wrong thing and can go negative #486

Affected Component

statewave-multi-agent-shared-context — main.py (compare())

Bug Description

The BEFORE vs AFTER table's "Deprecated modules rebuilt" row doesn't count deprecated modules:

# main.py, compare()
("Deprecated modules rebuilt",
 str(len(naive_result["coder"]["implementing"])),
 str(len(sw_result["coder"]["implementing"]) - sw_skipped if sw_skipped else "0")),

• Naive side: len(implementing) is every module the coder built, not just the deprecated ones. Building 6 modules, 1 of them deprecated, reports "6".
• Statewave side: implementing already excludes skipped modules (the coder parses IMPLEMENTING and SKIPPING as separate sections, agents/coder.py:80-81). Subtracting sw_skipped again is meaningless and can go negative (e.g. 2 implemented, 3 skipped → "-1"). When nothing was skipped it prints "0" even if a deprecated module was rebuilt.

pipeline_naive.py:64 already computes the right thing: the intersection of built modules with the planner's deprecated ones.

Expected Behavior

Both columns show how many deprecated modules the coder built.

Suggested fix

Have each pipeline return the deprecated-and-built count (the naive pipeline already computes built), e.g. result["deprecated_rebuilt"], and use that in both columns.

Steps to Reproduce

python main.py and compare the row against the coder's printed implementation list.

Environment

main @ eb66ddc.

Severity

Low — the headline comparison table reports a wrong number.