Release 0.3.0

• Add ApiModelBase (lib/fastcomments-client/api_model_base.rb) that centralizes deserialization and hash/serialization helpers (to_s, to_body, _to_hash, _deserialize behaviour).
• Refactor models to inherit from ApiModelBase (many model classes updated to < ApiModelBase) and remove duplicated implementations of _deserialize, to_s, to_body and _to_hash from individual model files to DRY up the codebase.
• Simplify anyOf handling in multiple generated anyOf wrapper classes: return find_and_cast_into_type(...) directly instead of assigning temporary typed_data variable.
• Change VoteResponse.status representation: replace the generated VoteResponseStatus model/anyOf with a plain String type; add enum validation for allowed status values (success, failed, pending-verification). Remove the VoteResponseStatus model and its docs.
• Add approved boolean property to PublicComment and PublicCommentBase (openapi.json and generated docs/models updated); wire attribute into attribute_map, openapi_types, initializer, equality/hash and docs.
• Require the new ApiModelBase from the main library file (lib/fastcomments-client.rb) and stop requiring removed VoteResponseStatus model.
• Update many model files to reflect the generator changes (generator version header updates, inheritance change, small internal refactors) — e.g., AddDomainConfig200ResponseAnyOf, AddDomainConfigParams, AddPageAPIResponse, Aggregation* models, API* models, Block*/Unblock*, Comment*, FeedPost*, Public* models and many others.
• Update generated specs: comment out auto-instantiation helper lines and update generator version notes in many spec files; various model spec files updated to reflect generator changes and removed generated helper objects.
• Remove VoteResponseStatus documentation file (docs/VoteResponseStatus.md) and update README/docs table of models to remove that entry.
• Minor codegen cleanups throughout (small style and simplification changes in many generated files: e.g. inlined returns, header generator version updates).