"""Runtime synthetic-injection fixture builders.

Each module here generates a per-test tmpfs fixture for a specific
negative-path scenario:

    - outlier.py        — outlier-injection-derkachi (FT-N-01)
    - blackout_spoof.py — blackout-spoof-derkachi   (FT-N-04, NFT-RES-04)
    - multi_segment.py  — multi-segment-derkachi   (FT-P-08)
    - cold_boot.py      — cold-boot-fixture        (FT-P-11, NFT-PERF-03)

AZ-406 supplies the package layout + public function signatures; concrete
generators are delivered by **AZ-408** (Runtime synthetic-injection fixture
builders).
"""