chore: release v0.5.0

[github-actions]

🤖 New release

• rig-compose: 0.4.3 -> 0.5.0 (⚠ API breaking changes)

⚠ rig-compose breaking changes

--- failure constructible_struct_adds_field: externally-constructible struct adds field ---

Description:
A pub struct constructible with a struct literal has a new pub field. Existing struct literals must be updated to include the new field.
        ref: https://doc.rust-lang.org/reference/expressions/struct-expr.html
       impl: https://github.com/obi1kenobi/cargo-semver-checks/tree/v0.47.0/src/lints/constructible_struct_adds_field.ron

Failed in:
  field ToolResultEnvelope.omitted_values in /tmp/.tmp0MKBwY/rig-compose/src/tool.rs:238
  field ToolResultEnvelope.redacted_values in /tmp/.tmp0MKBwY/rig-compose/src/tool.rs:241
  field ToolResultEnvelope.omitted_segments in /tmp/.tmp0MKBwY/rig-compose/src/tool.rs:244
  field ToolResultEnvelope.omitted_values in /tmp/.tmp0MKBwY/rig-compose/src/tool.rs:238
  field ToolResultEnvelope.redacted_values in /tmp/.tmp0MKBwY/rig-compose/src/tool.rs:241
  field ToolResultEnvelope.omitted_segments in /tmp/.tmp0MKBwY/rig-compose/src/tool.rs:244
  field ToolResultEnvelopeConfig.max_total_bytes in /tmp/.tmp0MKBwY/rig-compose/src/tool.rs:44
  field ToolResultEnvelopeConfig.redaction in /tmp/.tmp0MKBwY/rig-compose/src/tool.rs:47
  field ToolResultEnvelopeConfig.max_total_bytes in /tmp/.tmp0MKBwY/rig-compose/src/tool.rs:44
  field ToolResultEnvelopeConfig.redaction in /tmp/.tmp0MKBwY/rig-compose/src/tool.rs:47

Changelog

0.5.0 - 2026-05-28

Fixed

• (tool) Harden result envelope contract (#26)

Added

• Add ToolResultEnvelope redaction policies, path-aware omitted-segment
  continuation tokens, and total serialized-byte bounding so model-visible tool
  results can be redacted and globally bounded before downstream prompt, trace,
  or MCP cache use.

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This PR was generated with release-plz.