fix(deps): update python:3.14 docker digest to c1684c8

mentioned in merge request uis/devops/webapp-boilerplate!155

mentioned in merge request uis/devops/infra/terraform/gcp-cloud-run-app!159 (merged)

mentioned in merge request uis/devops/infra/terraform/terraform-test-cleanup!66 (merged)

mentioned in merge request uis/devops/iam/identifiers/api!3

mentioned in merge request uis/devops/infra/terraform/ucam-faas!89 (merged)

mentioned in merge request uis/devops/django/ucamprojectlight!11

mentioned in merge request uis/devops/infra/terraform/gcp-secret-manager!66

mentioned in merge request uis/devops/django/ucamlookup!28

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mentioned in merge request uis/devops/iam/activate-account/entra-event-handler!29

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mentioned in merge request uis/devops/infra/terraform/ucam-minimal-gcp-monitoring!12 (merged)

mentioned in merge request uis/devops/ucam-observe/ucam-observe-remote-client!24

mentioned in merge request uis/devops/lib/ucam-protobuf-testing-python!21

mentioned in merge request uis/devops/research/research-dashboard/ucamstaffoncosts!51

mentioned in merge request uis/devops/iam/card-database/message-schemas!8

mentioned in merge request uis/devops/fastapi-boilerplate!19

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mentioned in merge request uis/devops/infra/terraform/ucam-gcp-secret!47 (merged)

mentioned in merge request uis/devops/tools/aws-helper!89

mentioned in merge request uis/devops/infra/terraform/gcp-function!68 (merged)

mentioned in merge request uis/devops/lib/ucam-faas-python!56

mentioned in merge request uis/devops/django/api-gateway-auth!49

mentioned in merge request uis/devops/infra/terraform/gke-cluster!104 (merged)

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mentioned in merge request uis/devops/iam/activate-account/frontend!125

mentioned in merge request uis/devops/iam/activate-account/message-schemas!35

mentioned in merge request uis/devops/infra/terraform/gcp-scheduled-script!80 (merged)

mentioned in merge request gitlab-triage!42

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mentioned in merge request uis/devops/infra/terraform/ucam-observe-remote-server!58 (merged)

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mentioned in merge request uis/devops/renovate-config!176 (merged)

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mentioned in merge request uis/devops/infra/terraform/terraform-module-boilerplate!37 (merged)

mentioned in merge request uis/devops/infra/terraform/gcp-container-image-mirror!71 (merged)

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mentioned in merge request uis/devops/user-notify/ucam-user-notify!59

mentioned in merge request uis/devops/infra/terraform/gcp-cloud-run-function!66 (merged)

mentioned in merge request uis/devops/infra/terraform/gcp-site-monitoring!86 (merged)

mentioned in merge request uis/devops/lib/geddit!60 (merged)

mentioned in merge request uis/devops/tools/gcp-sql-backup!33

mentioned in merge request uis/devops/iam/ibis/ibis-client!21

mentioned in merge request uis/devops/tools/gitlab-utils!252 (merged)

mentioned in merge request uis/devops/lib/ucam-gitlab-stats!21

mentioned in merge request uis/devops/research/staff-on-costs-calculator/infrastructure!10

mentioned in merge request uis/devops/lib/fastapi-pagination!10

mentioned in merge request uis/devops/flask-automation!11

mentioned in merge request uis/devops/sms/sms-export/userdocs!10

mentioned in merge request uis/devops/research/staff-on-costs-calculator/webapp!13

mentioned in merge request uis/devops/infra/terraform/ucam-faas-long!58 (merged)

mentioned in merge request uis/devops/ucam-observe/ucam-observe-python!37

mentioned in merge request uis/devops/infra/terraform/gcp-notification-to-gitlab-issue!74 (merged)

mentioned in merge request uis/devops/iam/card-database/card-client!80

mentioned in merge request uis/devops/infra/terraform/gcp-pubsub-to-ms-teams!72 (merged)

mentioned in merge request uis/devops/infra/terraform/uis-traffic-manager-mtls!22 (merged)

mentioned in merge request uis/devops/docs/example-python-cli-tool!52

mentioned in merge request uis/devops/infra/terraform/gcp-alert-snooze!78 (merged)

mentioned in merge request uis/devops/infra/terraform/gcp-alert-to-gitlab-issue!7