dev branch configuration

[lolopinto]

Summary

• Enforce dev schema isolation defaults (includePublic=false, search_path dev-only) and consistent enablement rules across Go/TS.
• Add ignoreBranches (e.g. main/master) to skip dev schemas unless ENT_DEV_SCHEMA_ENABLED=true.
• Sanitize explicit schema names (lowercase, non-alnum -> _, max 63 chars, prefix with schema_ if leading digit).
• Propagate dev schema options through codegen/state, TS runtime, and auto_schema; docs/AGENTS updated.
• Make registry touches best-effort and remove runtime DDL in TS.
• Update docker changelog for dev schema config/pruning work (auto_schema changes for making changes in other schemas not just public #1946, dev branch configuration #1947).

addresses #499

Behavior notes

• devSchema.enabled is authoritative; schemaName alone does not enable.
• ignoreBranches applies only when not force-enabled via ENT_DEV_SCHEMA_ENABLED.
• Branch mismatch checks apply when using the state file (not explicit runtime config).

Tests

• go test ./internal/devschema
• jest src/core/dev_schema.test.ts