perf: pre-size 3 slices with known upper bounds

[KorsarOfficial]

Problem

Three slices allocated with zero capacity in paths that append a known number of elements.

Changes

File	Slice	Capacity
process/map.go:764	toRemove	len(registeredmaps)
process/map.go:765	toAdd	len(exemappings)
upload/uploader.go:179	askBuildIDs	len(buildIDs)
sample_consumer.go:349	tls	len(TlsValues.Values)

All hints are tight upper bounds. Allocations per call: 1+log2(n) to 1.

[KorsarOfficial]

📄 Full analysis report (PDF): 08-perforator-optimizations.pdf

Covers complexity analysis, concurrency audit, and verification for all 7 optimizations.