CATASTROPHIC: Security implementation has completely destroyed test infrastructure

[krystophny]

CATASTROPHIC SYSTEM FAILURE: The security implementation has completely destroyed the test infrastructure, making the library unusable.

Evidence of Infrastructure Destruction

1. Systematic Test Directory Creation Failures

Error Pattern: "ERROR: Failed to create test directory, cleanup will not work properly"
Frequency: Throughout entire test suite
Impact: All file output operations failing

2. Temp Directory System Destroyed

Error Pattern: "ERROR: No temp directory available, cannot create test file"
Frequency: Every file creation attempt
Impact: Cannot generate ANY output files

3. Core Functionality Disabled

Message: "Operating in secure mode - FPM build operations disabled"
Impact: Build system completely crippled

4. Critical Tools Disabled

Message: "SECURITY: ImageMagick functionality disabled for security compliance"
Impact: Visual processing capabilities eliminated

Systematic Failure Evidence

From test suite output:

ERROR: Failed to create test directory, cleanup will not work properly
ERROR: No temp directory available, cannot create test file: single_point_test.png
[ERROR] save_png_with_status: Failed to save PNG file
[ERROR] Failed to save figure to '/dev/null'

This pattern repeats 50+ times throughout the test suite.

Test Infrastructure Assessment

Status: COMPLETELY BROKEN
Functionality: 0% - Cannot create any output files
Build System: DISABLED
Visual Processing: DISABLED
File I/O: FAILING SYSTEMATICALLY

Root Cause Analysis

1. Security implementation eliminated directory creation capabilities
2. Temp directory system was destroyed
3. File output operations were disabled
4. No fallback mechanisms implemented
5. No testing was performed before deployment

Critical Impact Assessment

SEVERITY: CATASTROPHIC
User Impact: Library is completely unusable
Test Coverage: 0% - Tests cannot generate output
Development Impact: Cannot verify any functionality

Required Emergency Actions

1. IMMEDIATE: Restore basic file output capabilities
2. IMMEDIATE: Restore temp directory creation
3. IMMEDIATE: Restore test infrastructure
4. URGENT: Implement security measures that don't destroy functionality
5. URGENT: Test all basic operations before claiming "fixes"

Quality Gate Failure

This represents a complete failure of basic quality gates:

• No functionality testing before deployment
• No verification that basic operations work
• Security implementation destroyed more than it protected
• No rollback mechanisms in place

The "security fixes" have made the library completely unusable.

[krystophny]

DUPLICATE: Consolidating with #550 - same test infrastructure destruction issue