Document DS4 experiment and partial results

[sudoantonio]

What changed

• documents DeepSeek V4 Flash as the model used throughout the AI-assisted stages of the thesis;
• identifies Salvatore Sanfilippo's DS4 / DwarfStar as the local inference runtime;
• uses the attached graph as the repository's main image;
• describes the structure and results of the G1 graph using the versioned artifacts;
• explicitly states that the experiment is partial;
• distinguishes the 45-question extraction draft from the future simplified D2 questionnaire for organisations.

Documented results

• G1 graph: 171 nodes, 170 edges, one root, and 68 terminal nodes;
• 219 valid signatures and 143 distinct signatures;
• 99 calls with a unique signature;
• 120 calls distributed across 44 duplicate-signature groups;
• terminal distribution: 79 FIN, 50 APP, 40 ACC, 36 MAN, and 14 MIX.

Declared limitation

The D2_soggetti_giuridici questionnaire, intended to reduce the base questionnaire
to a targeted set of questions about participating organisations, has not yet been
stabilised or applied to real organisational profiles. Matching and ranking are
therefore not presented as empirical results.

Verification

• 89 tests passed;
• Python compilation completed successfully;
• metrics recalculated from the repository's JSON artifacts;
• graph image recovered unchanged from the thesis Keynote presentation.