LovroG05
da47afce5b
feat: add core backend packages
store: pgx query layer for all entities
config: viper-based config with OIDC/rate-limit fields
crypto: AES-256-GCM credential encryption
billing: async cost recording post-response
catalog: in-memory model catalog with DB-backed sync
ratelimit: fixed 1-min RPM/TPM window limiter
oidcauth: OIDC JWT admin verification via go-oidc/v3
providermgr: provider lifecycle and credential decryption
providers: OpenAI-compat transport, Anthropic translation, embeddings