Add ISO/ZIP acquisition pipeline (ams.acquire worker)

Closes the chain from a game file to a catalog entry: unpack an ISO/ZIP,
content-identify the engine DLL (CMC_ObjectsContainer marker in RTTI, so a
renamed file is still found), hash it (sha256 + md5 + optional ssdeep via
ppdeep), run Ghidra headless with the extractor, enrich and import the snapshot.

- unpack.py: bsdtar (ISO9660 + ZIP) with a pure-Python zipfile fallback
- identify.py: content-based engine-DLL picker + hashing
- ghidra.py: analyzeHeadless launcher discovery + post-script run
- pipeline.py: orchestration with injectable extract_fn; sink db|http|none
- cli.py: python -m ams.acquire (incl. --identify-only dry run)
- tests: 7 new (forged PE markers + stubbed extractor) -> 18/18

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

README.md

@@ -48,6 +48,28 @@ analyzeHeadless <projDir> <projName> -process PIKLIB8.dll \
     -postScript extract_engine_surface.py "$(pwd)/snapshots/PIKLIB8.snapshot.json"
 ```
 
+## Akwizycja — ISO/ZIP → katalog
+
+Worker, który domyka łańcuch od *pliku gry* do wpisu w katalogu: rozpakowuje archiwum,
+**sam znajduje DLL silnika** (po markerach w binarce — `CMC_ObjectsContainer` w RTTI —
+więc działa nawet po zmianie nazwy pliku), liczy hashe (sha256 + md5 + opcjonalnie ssdeep),
+odpala Ghidrę headless z ekstraktorem i ląduje snapshotem w bazie.
+
+```bash
+pip install -e ".[api,acquire]"                  # acquire = ppdeep (fuzzy hash, opcjonalny)
+export GHIDRA_HEADLESS=/path/to/ghidra/support/analyzeHeadless   # albo GHIDRA_HOME
+
+python -m ams.acquire game.iso --game "Reksio i UFO"             # ISO/ZIP/katalog/luźny DLL
+python -m ams.acquire dump_dir --game "Reksio i UFO" --sink http --post http://127.0.0.1:8000
+python -m ams.acquire PIKLIB8.dll --identify-only                # tylko unpack+identify+hash, bez Ghidry
+```
+
+`--sink db` (domyślnie) importuje wprost do bazy, `--sink http` POST-uje na `/snapshots`,
+`--sink none` zostawia sam snapshot. `--identify-only` to suchy bieg do walidacji bez Ghidry.
+Rozpakowywanie stoi na `bsdtar` (libarchive — czyta i ISO9660, i ZIP); ZIP ma fallback na
+czysty Python. Snapshot dostaje doklejony blok `binary.acquisition` (źródło, nazwa DLL) oraz
+`binary.fuzzy/md5/size`.
+
 ## Diff engine (CLI)
 
 ```bash