feat(logs): make application level parsing opt-in

[lilienblum]

Summary

• add deployment-level logs.parseApplicationLevels configuration, disabled by default
• use recognized top-level JSON levels for OTLP severity in worker and operator capture paths
• preserve the original log body and retain existing severity fallback behavior
• expose the setting in generated schemas, Helm, and CloudFormation

Recognized values are TRACE, DEBUG, INFO, WARN/WARNING, ERROR, and FATAL, matched case-insensitively.

Verification

• alien-core, alien-deployment, alien-operator, alien-worker-runtime, Helm, and CloudFormation tests
• generated TypeScript schemas and CloudFormation snapshots
• Helm template and kubeconform validation
• cfn-lint validation
• git diff --check

Linear: https://linear.app/alienplatform/issue/ALIEN-546

[greptile-apps]

Greptile Summary

The PR makes application-provided JSON log-level parsing opt-in and propagates the setting through deployment generators and runtime capture boundaries.

• Adds shared parsing for recognized top-level JSON level values.
• Preserves raw log bodies and stream-based fallback severity.
• Exposes the option through stack settings, Helm, and CloudFormation.
• Threads the setting into worker, daemon, and operator capture paths.

Confidence Score: 5/5

The PR appears safe to merge.

No blocking failure remains.

Important Files Changed

Filename	Overview
crates/alien-core/src/application_logs.rs	Adds the shared parser and recognized application-level mapping.
crates/alien-core/src/stack_settings.rs	Adds the opt-in log setting with disabled-by-default serialization semantics.
crates/alien-deployment/src/helpers.rs	Injects or removes the runtime parsing environment variable during deployment reconciliation.
crates/alien-worker-runtime/src/otlp.rs	Applies parsed application levels to captured OTLP records while retaining stream fallback.
crates/alien-operator/src/collector_logs.rs	Applies the shared severity mapping to operator-collected application logs.
crates/alien-cloudformation/src/generator.rs	Adds the deployment parameter and serializes its boolean value into registered stack settings.
crates/alien-helm/src/generator.rs	Carries the new stack setting through generated Helm configuration.

Flowchart

%%{init: {'theme': 'neutral'}}%%
flowchart LR
  Settings[logs.parseApplicationLevels] --> Deploy[Deployment environment injection]
  Settings --> IaC[Helm and CloudFormation output]
  Deploy --> Worker[Worker runtime capture]
  Deploy --> Daemon[Daemon capture]
  Settings --> Operator[Operator collector capture]
  Worker --> Parser[Top-level JSON level parser]
  Daemon --> Parser
  Operator --> Parser
  Parser --> OTLP[OTLP severity fields]
  Fallback[stdout INFO / stderr ERROR] --> OTLP

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