Fix: relax tiny image confidence assertion — PRNU may return non-zero confidence

Fix: s[score] → s['score'] (NameError), fix cached_download → hf_hub_download

feat: Calibration, dedup fix, signal tests

feat:DCT Frequency Artifact Detection (25th signal)

feat:Deep Metadata Forensics signal (24th signal)

feat:ELA (Error Level Analysis) signal (23rd signal)

fix: frontend bugs, security deps, cleanup unused files

Fix: update safetensors 0.4.1→0.4.5 and accelerate 0.25→1.7.0 for transformers 4.53 compat

Fix: update huggingface_hub 0.20.0 → 0.30.0 to satisfy transformers 4.53.0

fix: update all vulnerable dependencies (Dependabot alerts)

Fix: update test assertions for v1.1 and 4 detection methods

feat: PRNU camera fingerprint signal (22nd detection signal)

feat: Phase 4 — evidence_id in UI, fix 42 security vulnerabilities

feat: Phase 3 — audit log, analysis history API, evidence_id in UI

Fix: restore all missing imports in image_forensics.py (PIL, datetime, etc)

Fix: restore missing 'from typing import Dict, Any' in image_forensics.py

feat: add evidence_id to every forensic report, fix duplicate import

feat: add unique evidence_id to every forensic report

Fix: ensemble skips DIRE when unavailable, redistributes weight to statistical+CLIP

Fix: DIRE returns confidence 0.0 on failure so ensemble ignores it

Fix: add GitHub Pages and HF Space to default CORS origins

Remove duplicate psutil entry in requirements.txt

Fix: Correct misleading comments on signal counts

Cleanup: Remove junk files from repo

Fix: Add psutil==5.9.8 to requirements.txt

Fix: All CI failures resolved

Fix: Revert StatisticalDetector test to expect 19 signals

Fix: Revert StatisticalDetector tests to 19

Fix: Update all tests to expect 21 signals

Fix: Complete CI resolution - all 6 issues

Update status code assertions for empty file test

Update status code checks for empty file validation

Fix: Update test assertions to expect 21 signals

Fix: Update test_api_stress.py to expect HTTP 415

Fix: Add psutil dependency to requirements.txt

Fix: Add ALLOWED_DOC_TYPES and use tuples for type validation

Fix: Add ALLOWED_DOC_TYPES to Settings

Fix: Change sets to tuples to support concatenation

Fix: Add ALLOWED_VIDEO_TYPES to Settings (empty set)

Fix: Add missing Set import to config.py

Fix: Add ALLOWED_IMAGE_TYPES and ALLOWED_UPLOAD_EXTENSIONS to Settings

Config: Update production configuration with environment variables

Tests: Mark ML model tests as slow for faster CI

Tests: Update test_api_stress.py to expect 415 status code

Register custom pytest markers in conftest.py

Refactor cache methods to accept file identifier types

Refactor error handling and optimize file hashing

Fix all 4 persistent test failures

Fix final 2 test failures (#38)

Fix remaining 5 test failures (#38)