High-confidence `import_map` collides on common method names

[avigdorsky]

Severity: medium-high — survives a confidence >= 0.9 filter.

from unittest.mock import patch is bound to a REST view's HTTP handler
PkgConfigView.patch with strategy=import_map, confidence=0.95. This is 4 of the
5 misses in the filtered sample — i.e. the dominant residual error once consumers
do filter correctly.

Ask: when a name is imported in the caller's file, prefer that import's target
over a same-named method elsewhere in the graph.

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Observed on v0.10.8 (build 996bad5fe6fb), macOS arm64, Python monorepo (~36k nodes / ~179k edges). Happy to provide a minimal reproduction repo if useful.