Improve refund policy

[Deniskore]

1. Split gateway task timeout from result retention with new taskmanager_task_lifetime.
2. Set workers default task deadline to 10 minutes and in-memory result retention to 5 minutes.
3. Use task lifetime, not result lifetime, for DB generation task deadlines.

[Copilot]

Pull request overview

This PR separates “task deadline/timeout” from “in-memory result retention” by introducing a distinct taskmanager_task_lifetime alongside the existing taskmanager_result_lifetime, and wires these through config, DB settings, and the TaskManager so runtime settings can adjust them independently.

Changes:

• Added task-vs-result lifetimes to config + DB app_settings, with new defaults (task: 10m, results: 5m).
• Updated TaskManager to track task/result lifetimes separately and allow updating them at runtime.
• Updated task deadline calculation for DB generation tasks to use task lifetime (not result lifetime) and adjusted tests/harnesses accordingly.

Reviewed changes

Copilot reviewed 21 out of 21 changed files in this pull request and generated 2 comments.

Show a summary per file

File	Description
tests/event_tracker/worker.rs	Updates test harness options to set task lifetime for timeout behavior.
tests/event_tracker/support.rs	Extends runtime settings updates to include task/result lifetime columns.
tests/common/real_harness.rs	Adds task lifetime option + seeds new lifetime columns into app_settings.
tests/client_http_api/support.rs	Includes new lifetime fields when updating gateway runtime settings.
tests/client_http_api/generic_rate_limits.rs	Switches end-to-end timeout behavior to task lifetime.
src/test_support.rs	Passes task_lifetime into TaskManagerInit when building shared harness core.
src/task/tests.rs	Adds coverage for lifetime updates + updates struct literals for new init field.
src/task/mod.rs	Implements separate task/result lifetimes (atomics) + runtime update API.
src/raft/tests/cross_gateway_add_task.rs	Passes configured task lifetime into TaskManagerInit in raft tests.
src/raft/rate_limit/engine.rs	Constructs TaskManager with explicit task lifetime in tests.
src/raft/mod.rs	Reorders settings updater spawn to provide TaskManager for runtime lifetime updates.
src/raft/gateway_state.rs	Exposes task/result lifetime accessors from DB settings or config fallback.
src/http3/handlers/task/add_task.rs	Uses task lifetime for generation-task DB deadline calculation.
src/db/gateway_settings.rs	Adds lifetime fields to cached settings + pushes runtime updates into TaskManager.
src/db/data_access.rs	Adds new app_settings columns to gateway settings row decode + SELECT.
src/config.rs	Adds taskmanager_task_lifetime with defaults; adds default for result lifetime.
dev-env/init-scripts/init-schema.sql	Adds app_settings columns + defaults and seeds initial row values.
dev-env/config/config1.toml	Updates dev config to use new lifetime split and defaults.
dev-env/config/config2.toml	Updates dev config to use new lifetime split and defaults.
dev-env/config/config3.toml	Updates dev config to use new lifetime split and defaults.
dev-env/config/config-single.toml	Updates dev config to use new lifetime split and defaults.

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[Copilot]

Pull request overview

Copilot reviewed 21 out of 21 changed files in this pull request and generated no new comments.