feat(prowler): chunk7 add the AWS base contract (#422)

[Christophe Melchior (Kakudou)]

Part of #422.

Chunk 7 of the Prowler injector stack: add the AWS base contract — the CHK007 base AWS provider: the BDD suite (behaviour, Unicode-digit account-ID rejection, OCSF status / AWS endpoint / lifecycle / verbose-diagnostic fixtures), the contracts/aws.py AWS contract module, its registration in the registry / __init__ / injector (AWS becomes the sole default executable contract), the quality-gate pass, and the final OCSF capture alignment (chk001 BDD + chk006 unit included).

Re-landed from feat/422-prowler-chk007-base-aws-provider (3d06af3..5603b0d): 9 source commits folded into 2 (G1: cba1e76 + 5 test-alignment folds; G2: fc54715 + a1cde93 + 5603b0d — every cherry-pick applied clean, zero conflicts). Gate V (whole-branch tree vs source tip 5603b0d): byte-identical except (a) the 14 pyproject.toml version differences of the other injectors (base move to 3.260821.0; prowler/ untouched), (b) the 4 trap-analysis.md files excluded by standing call (3 carried from earlier chunks + the new chk007 one), and (c) one approved deviation — the pinned pyoaev version assert removed from prowler/tests/unit/chk006_executable_base/test_outputs_registry_runtime.py.

[codecov]

Codecov Report

❌ Patch coverage is 95.45455% with 1 line in your changes missing coverage. Please review.
✅ All tests successful. No failed tests found.

Files with missing lines	Patch %	Lines
prowler/prowler/contracts/aws.py	94.73%	1 Missing ⚠️

Additional details and impacted files

@@                               Coverage Diff                                @@
##           feat/422-prowler-injector-chk6-contract-base     #437      +/-   ##
================================================================================
+ Coverage                                         84.82%   84.84%   +0.02%     
================================================================================
  Files                                               186      187       +1     
  Lines                                              8058     8079      +21     
================================================================================
+ Hits                                               6835     6855      +20     
- Misses                                             1223     1224       +1     

Files with missing lines	Coverage Δ
prowler/prowler/contracts/__init__.py	100.00% <100.00%> (ø)
prowler/prowler/contracts/registry.py	93.47% <100.00%> (+0.14%)	⬆️
prowler/prowler/injector/openaev_prowler.py	93.97% <ø> (ø)
prowler/prowler/contracts/aws.py	94.73% <94.73%> (ø)

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