Add safe DEX checksum repair flow (for androguard)

[e619003]

Description

When loading APK/DEX with the Androguard core, corrupted DEX header checksum/signature causes Androguard to refuse loading and abort the analysis.

Workflow

Scope: This change is Androguard‑only. Other cores (rizin, radare2, shuriken) are unaffected.

1. Androguard load flow (APK path)

   • If AnalyzeAPK(self.data, raw=True) raises a checksum‑related error:

     1. When --auto-fix-checksum is provided:
        Silently repair all .dex headers in‑memory and retry loading.

        • DEX header repair:
          • SHA‑1 at 0x0C..0x1F = sha1(data[0x20:]) (20 bytes).
          • Adler32 at 0x08..0x0B = adler32(data[0x0C:]) (4 bytes, little‑endian).

     2. When --auto-fix-checksum is not provided:

        • Interactive TTY : prompt the user once with a clear warning that repairing modifies DEX headers and invalidates APK signatures (hashes will change). Proceed only if the user agrees.
        • Non‑interactive : skip repair and raise the original error, printing a concise hint to rerun with --auto-fix-checksum.

2. Androguard load flow (DEX path)

   • Same policy as the APK path:
     • If a checksum‑related error occurs in addDEX(...), honor --auto-fix-checksum to repair the single DEX header and retry.
     • Without the --auto-fix-checksum flag and prompt in TTY, skip in non‑interactive.

Behavior

• Without --auto-fix-checksum (default)

  • Interactive TTY : shows a single confirmation prompt, repairs only on user consent.
  • Non‑interactive : does not repair and does not block; prints a hint to re‑run with --auto-fix-checksum, then raises the original error.

• With --auto-fix-checksum

  • Performs an in‑memory silent repair and retries the load (no prompt).

• Other cores (not androguard):

  • unchanged.

[pulorsok]

LGTM

[codecov]

Codecov Report

❌ Patch coverage is 89.28571% with 9 lines in your changes missing coverage. Please review.
✅ Project coverage is 82.27%. Comparing base (05e7ffa) to head (6b541db).
⚠️ Report is 4 commits behind head on master.

Files with missing lines	Patch %	Lines
quark/core/apkinfo.py	96.00%	3 Missing ⚠️
quark/core/parallelquark.py	0.00%	3 Missing ⚠️
quark/cli.py	0.00%	2 Missing ⚠️
quark/core/quark.py	75.00%	1 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##           master     #866   +/-   ##
=======================================
  Coverage   82.27%   82.27%           
=======================================
  Files          80       80           
  Lines        6844     6844           
=======================================
  Hits         5631     5631           
  Misses       1213     1213           

Flag	Coverage Δ
unittests	82.27% <89.28%> (ø)

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