add ctlog-monitor component

[fghanmi]

Summary by Sourcery

Add configuration for the ctlog-monitor component alongside updates to the existing rekor-monitor pipelines, including Dockerfile renaming and trigger refinements

New Features:

• Add Tekton PipelineRun definitions for the new ctlog-monitor component on pull requests and pushes
• Introduce Dockerfile.ctlog-monitor.rh for building the ctlog-monitor component

Enhancements:

• Rename Dockerfile.rh to Dockerfile.rekor-monitor.rh in rekor-monitor pipeline configurations
• Refine path-based triggers in rekor-monitor pipelines to only include rekor-monitor-related files

[sourcery-ai]

Reviewer's Guide

This PR refactors the rekor-monitor Tekton pipelines by renaming its Dockerfile and adjusting trigger expressions, and introduces a new ctlog-monitor component with dedicated pull-request and push pipelines plus its Dockerfile.

Flow diagram for ctlog-monitor pipeline triggers

flowchart TD
  PR["Pull Request Event"] --> CELPR["CEL Expression (ctlog-monitor-pull-request.yaml)"]
  CELPR -->|if matched| CMPR["ctlog-monitor-pull-request PipelineRun"]
  PUSH["Push Event"] --> CELPU["CEL Expression (ctlog-monitor-push.yaml)"]
  CELPU -->|if matched| CMPU["ctlog-monitor-push PipelineRun"]
  CMPR --> CMDF["Dockerfile.ctlog-monitor.rh"]
  CMPU --> CMDF
  CMPR -->|builds| IMGPR["quay.io/securesign/ctlog-monitor:on-pr-{{revision}}"]
  CMPU -->|builds| IMGPU["quay.io/securesign/ctlog-monitor:{{revision}}"]

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File-Level Changes

Change	Details	Files
Rename and update rekor-monitor pipeline definitions	Renamed Dockerfile.rh to Dockerfile.rekor-monitor.rh in pull-request and push pipelines Updated on-cel-expressions to watch the new Dockerfile and removed ct_monitor path triggers Adjusted pipeline parameter values to reference Dockerfile.rekor-monitor.rh	.tekton/rekor-monitor-pull-request.yaml .tekton/rekor-monitor-push.yaml
Add ctlog-monitor Tekton pipeline configurations	Created pull-request pipeline yaml with annotations, labels, params, and serviceAccount Created push pipeline yaml with annotations, labels, params, and empty taskRunTemplate Configured triggers to respond to changes in Dockerfile.ctlog-monitor.rh, code, and dependencies	.tekton/ctlog-monitor-pull-request.yaml .tekton/ctlog-monitor-push.yaml
Introduce Dockerfile for ctlog-monitor	Added Dockerfile.ctlog-monitor.rh to build the ctlog-monitor component	Dockerfile.ctlog-monitor.rh

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[sourcery-ai]

Hey there - I've reviewed your changes - here's some feedback:

• The Tekton YAML for both ctlog-monitor and rekor-monitor pipelines share almost identical on-cel-expression trigger lists—consider extracting or templating this common logic to reduce duplication and drift.
• The new ctlog-monitor component uses mixed naming conventions (hyphens in Dockerfile and pipeline names vs underscores in cmd/ct_monitor), so aligning these will avoid confusion and ensure consistency across the repo.
• In ctlog-monitor-push.yaml, the taskRunTemplate is empty while the pull-request pipeline specifies a service account—verify this is intentional or add the appropriate serviceAccountName for consistent permissions.

Prompt for AI Agents

Please address the comments from this code review:

## Overall Comments
- The Tekton YAML for both `ctlog-monitor` and `rekor-monitor` pipelines share almost identical on-cel-expression trigger lists—consider extracting or templating this common logic to reduce duplication and drift.
- The new `ctlog-monitor` component uses mixed naming conventions (hyphens in Dockerfile and pipeline names vs underscores in `cmd/ct_monitor`), so aligning these will avoid confusion and ensure consistency across the repo.
- In `ctlog-monitor-push.yaml`, the `taskRunTemplate` is empty while the pull-request pipeline specifies a service account—verify this is intentional or add the appropriate serviceAccountName for consistent permissions.

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