Release v0.9.0 shared memory and prompt context

[Nickel85]

Summary

• roll Mongoose to v0.9.0 with shared local memory and prompt-context retrieval
• add loop-aware memory, decision/rule/experiment memory contracts, and validation
• add Njord finance audit memory records and Portfolio thesis reference capability
• update runtime docs, architecture artifacts, CI, and release notes

Validation

• python tests/release-version-validation.py
• python tests/architecture-validation.py
• python tests/decision-rule-experiment-contract-validation.py
• python tests/loop-aware-memory-contract-validation.py
• python tests/mongoose-memory-validation.py
• python tests/portfolio-thesis-validation.py
• python tests/njord-finance-memory-validation.py
• python tests/njord-ai-loop-validation.py
• powershell -ExecutionPolicy Bypass -File ./tests/install-validation.ps1

Closes

Closes #109
Closes #153
Closes #164
Closes #165
Closes #166
Closes #170