ci: add chile tariff JSON to git, configure default test env vars, ma… #391

Job	Run time
Lint (ruff)	13s
Tests (pytest)	1m 43s
Terraform validate	9s
Security (bandit + pip-audit)	50s
Helm lint & template	9s
Type check (mypy)	1m 16s
BEP-0200 DRL + Market Adapters (Python 3.12)	1s
Interop Contract Tests (BESSAI-SPEC-001)	1s
Load Tests (Locust)	1s
Docker build	1s
Container scan (Trivy)	1s
Push to Artifact Registry	1s
	4m 26s

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