Release Listening Stack 0.3 core profile

[emeisazam]

Summary

• make AKOÚŌ, Earworm, Akousmata, and Oída the default accountable listening core
• move GERM to explicit full or standalone optional profiles with bounded paths and no core configuration leakage
• introduce state v2, semantic contract ownership, decision-route doctor checks, and v1 compatibility
• pin the exact public AKOÚŌ 0.9.0, Earworm 0.6.0, Akousmata 0.6.0, and Oída 0.9.0 tag commits

Validation

• 56 tests on the final immutable compatibility set
• reproducible pyz build and checksum verification
• core and full dry-run plans, shell syntax, contract-matrix, public-tag, and privacy audits