Per-file py_lsp emits resolved_calls.callee_qn as the raw import-module
path (e.g. `greeter.Greeter` from `from greeter import Greeter`) rather
than the project-qualified QN the gbuf stores (`<project>.greeter.Greeter`).
Before this change, the LSP match succeeded (lsp_overrides counter
incremented) but the downstream cbm_gbuf_find_by_qn lookup missed
silently and the edge was dropped — the failure mode the new
lsp_overrides telemetry was designed to surface.
The LSP layer can't tell in-project imports (qualify) from external
imports (don't qualify, e.g. `os.path`) without consulting the gbuf,
which is built downstream. So normalise at the consumer instead: try
the LSP-emitted QN as-is first; on miss, retry with
`<project>.<callee_qn>`. If that also misses, drop the edge — same as
before, target is external/unindexed.
New helper cbm_pipeline_lsp_target_node in lsp_resolve.h is shared by
both pipelines (sequential pass_calls.c and parallel pass_parallel.c)
so they continue to admit identical sets of LSP overrides. The helper
also canonicalises res.qualified_name to the gbuf node's QN, so
downstream edge property serialisation shows the project-qualified
form even when fallback resolution kicked in.
Cross-file regression test parallel_python_lsp_override_cross_file_-
emits_lsp_strategy_edges pins the two-file Greeter scenario that
originally exposed the bug.