docs: changelog with DRAFT highlights before release

[skip ci]

CHANGELOG.md

@@ -6,9 +6,34 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
-## [0.134.0] - 2024-09-09
+## [0.134.0] - 2024-09-10
+
+## qsv pro v1 is here! 🎉
+If you've been using qsv for a while, even if you're a command-line ninja, you'll find a lot of new capabilities in qsv pro that can make your data wrangling experience even better!
+
+Apart from making qsv easier to use, qsv pro has a multitude of features including: view interactive data tables; browse stats/frequency/metadata; run recipes and tools (scripts); run Polars SQL queries; an interface using Retrieval Augmented Generation (RAG) techniques to convert Natural Language queries to Polars SQL; regular expression search; export to multiple file formats; download/upload from/to compatible CKAN instances; design custom node-based flows and data pipelines; interact with a local API from external programs including the qsv pro command, and run various qsv commands in a graphical user interface; and the list goes on!
+
+That's just the beginning, there's more to come more to come! You just have to try it!
+
+Download qsv pro v1 now at [qsvpro.dathere.com](https://qsvpro.dathere.com/.
+
+Other highlights include:
+`pro`: new command to allow qsv to interact with the qsv pro API to tap qsv pro exclusive features
+- `lens`: new command to interactively view CSVs using the [csvlens](https://github.com/YS-L/csvlens) crate.
+- The ludicrously fast `diff` command is now easier to use with its `--drop-equal-fields` option. @janriemer continues to work on his `csv-diff` crate, and there's more `diff` UX improvements coming soon!
+- `stats` adds `sum_length` and `avg_length` "streaming" statistics in addition to the existing `min_length` and `max_length` metrics. These are especially useful for datasets with a lot of "free text" columns.
+- `stats` also got "smarter" and "faster" by [dog-fooding](https://en.wikipedia.org/wiki/Eating_your_own_dog_food) its own statistics to make it run faster!  
+   
+It's a little complicated, but the way `stats` works is that it compiles the "streaming" statistics on the fly first, and the more expensive advanced statistics are "lazily" computed at the end.  
+Since we now compile "sort order" in a streaming manner, we use this info when deriving cardinality at the end to see if we can skip sorting - an otherwise necessary step to get cardinality which is done by "scanning" all the sorted values of a column. Everytime two neighboring values differ in a sortedcolumn, it increments the cardinality count.  
+Apart from this "sort order" optimization, we also improved the "cardinality scan" algorithm - halving its memory footprint and making it faster still for larger datasets by parallelizing the computation!  
+This in turn, makes the `frequency` command faster and more memory efficient!
+- we now also use our own fork of the `csv` crate, featuring SIMD-accelerated UTF-8 validation and other minor perf tweaks, making the *entire qsv suite* faster still!
+
+---
 
 ### Added
+* `pro`: add `qsv pro` command to interact with qsv pro API by @rzmk in https://github.com/jqnatividad/qsv/pull/2039
 * `lens`: new command to interactively view CSVs using the [csvlens](https://github.com/YS-L/csvlens) crate https://github.com/jqnatividad/qsv/pull/2117
 * `apply`: add crc32 operation https://github.com/jqnatividad/qsv/pull/2121
 * `count`: add --delimiter option https://github.com/jqnatividad/qsv/pull/2120