Polish DEV article claims and citations

[gbayerv26]

What changed

• linked the OWASP ASI06 classification and primary memory-poisoning research
• separated the 80% attack-success result from the 99.8% memory-insertion result
• replaced the broad "No scanner. No firewall." wording with a precise description of Memwall's positioning
• updated the article from v0.3 to v0.4

Why

The launch article should be current, defensible, and directly sourced before it is published on DEV.

Validation

• git diff --check
• confirmed pyproject.toml reports version 0.4.0
• confirmed the pushed branch SHA matches the local commit