Add support for the Duration CQL data type

[vponomaryov]

Example of the Duration CQL data type usage in a rune script:

  let d1 = "1y3mo2w6d13h14m22s33ms44us55ns";
  let d2 = "55mo345d11ns";
  let d3 = "1m5s3ms";
  let d4 = "5s";

[Copilot]

Pull Request Overview

This PR adds support for the Duration CQL data type by introducing a new branch in the value conversion function that parses duration strings into a CqlDuration.

• Added a new match arm for Value::String(s) handling for NativeType::Duration.
• Introduced regex-based parsing to extract duration components from ISO 8601–like strings.

Comments suppressed due to low confidence (2)

src/scripting/bind.rs:107

• Consider adding unit tests for the new duration parsing logic to cover a variety of valid and invalid ISO 8601 format examples.

(Value::String(s), ColumnType::Native(NativeType::Duration)) => {

src/scripting/bind.rs:159

• [nitpick] The error message 'Got invalid duration value' could include additional context (such as which part of the input was unrecognized) to aid in debugging.

} else if cap.name("invalid").is_some() {

[vponomaryov]

@fruch , @soyacz
I would like to have some review here because of the data transformation specifics.

To try out it locally do following:

$ make docker-build

[Copilot]

Pull Request Overview

This PR adds support for the CQL Duration data type by introducing a new parsing branch in the value conversion function. Key changes include:

• Adding a new regex-based duration parser in src/scripting/bind.rs.
• Extending the match in to_scylla_value to handle NativeType::Duration.
• Updating Cargo.toml to include the once_cell dependency.

Reviewed Changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated no comments.

File	Description
src/scripting/bind.rs	Implements duration parsing using a regex and converts it to CqlDuration.
Cargo.toml	Adds the once_cell dependency required for lazy regex initialization.

Comments suppressed due to low confidence (2)

src/scripting/bind.rs:19

• Consider anchoring the duration regex with '^' and '$' to ensure that the entire input string is validated against the expected duration format.

static DURATION_REGEX: Lazy<Regex> = Lazy::new(|| {

src/scripting/bind.rs:186

• [nitpick] Consider providing additional details in the error message about the supported duration format to aid debugging.

else if cap.name("invalid").is_some() {

[soyacz]

maybe worth to add unit tests for that?
Otherwise, if performance is key, there's nom library that could help in that scope

[vponomaryov]

@soyacz
Added unit tests