Polaris 0.4.0

What's Changed

• chore: update polaris-ai to 0.8.1 by @localminimum in #10
• Add a flow module to polaris_cosmos for durable, budgeted multi-step agent workflows by @localminimum in #12
• Run each agent call in its own session with its own prompt, tool folder, command list and spend cap by @localminimum in #13
• docs: add a contributing guide and an agent safety guide by @localminimum in #14
• Run each agent call in its own session with its own prompt, tool folder, command list and spend cap by @localminimum in #15
• Unattended Chat Completions runs with native ATIF export by @localminimum in #16
• Harbor adapter for Terminal-Bench and static Linux release archive by @localminimum in #17
• chore: release 0.4.0 by @localminimum in #18

Full Changelog: v0.3.0...v0.4.0