Changelog

3.0.0

RMPClientConfig.from_env() removed. Pass RMPClientConfig() directly; there is no longer an env-var-driven constructor.
RMPClientConfig.rate_limit_per_minute removed. Rate limiting is now handled internally by a fixed-capacity TokenBucket and is no longer configurable via config.
School model: city, state, country replaced by location. The three separate fields are merged into a single location: Optional[str] (e.g. "Toronto, ON, Canada").
ProfessorSearchResult and SchoolSearchResult: page field removed. Both result types are now cursor-only — the page: int field is gone.
search_schools() and search_professors(): page parameter removed, cursor parameter added. Paginate by passing cursor=result.next_cursor.
Professor.url field removed.
RatingSummary model removed.

Full school support: get_school(), get_compare_schools(), get_school_ratings_page(), iter_school_ratings().
New models: SchoolRating, SchoolRatingsPage, CompareSchoolsResult.
Iterators: iter_professors_for_school(), iter_professor_ratings() — both handle cursor pagination automatically.
get_professor_ratings_page() now accepts a course_filter parameter.
Rating gains details, thumbs_up, thumbs_down fields.
extras module (all re-exported from rmp_client): analyze_sentiment, SentimentResult, is_valid_comment, normalize_comment, ValidationResult, CommentIssue, build_course_mapping, clean_course_label.
TokenBucket is now publicly exported from rmp_client.

Helpers (formerly dedupe): normalize_comment strips HTML by default and supports strip_punctuation; is_valid_comment returns a ValidationResult with valid and issues instead of a boolean, checking for empty, too short, all caps, excessive repeats, and no alphabetic characters.
Ingest example: Updated to use is_valid_comment(...).valid for the new return type.