feat: opt in bulk publish in deploy command

[ayeshurun]

Summary

By default, fab deploy publishes items one at a time. This PR introduces an opt-in --bulk_publish command flag, when provided, the deploy command uses a single bulk import API call via the underlying fabric-cicd library.

The feature is disabled by default, so existing deployments keep the standard per-item publish behavior. When enabled, the CLI automatically turns on the required enable_experimental_features and enable_bulk_publish fabric-cicd feature flags and prints a warning that the feature is experimental.

Changes

• New command flag: Added --bulk_publish (if not provided, default is false).
• Deploy behavior: deploy_with_config_file now calls _apply_bulk_publish_feature_flags(args), which appends the enable_experimental_features and enable_bulk_publish feature flags and warns the user when the flag was provided.
• Dependency bump: Raised fabric-cicd requirement from >=0.3.1 to >=1.2.0 in pyproject.toml and requirements-dev.txt (required for the bulk import API).

[Copilot]

Pull request overview

Adds an opt-in configuration switch to enable experimental “bulk publish” behavior for fab deploy by turning on the required fabric-cicd feature flags, along with dependency/docs/tests updates to support and document the new capability.

Changes:

• Introduces deploy_bulk_publish_enabled config key (default false) and wires it into deploy_with_config_file to append enable_experimental_features + enable_bulk_publish.
• Updates documentation and changelog entry describing how to enable/disable the experimental behavior.
• Bumps fabric-cicd dependency floor to >=1.2.0 and adds/updates tests + VCR recordings for the new setting.

Reviewed changes

Copilot reviewed 10 out of 11 changed files in this pull request and generated 3 comments.

Show a summary per file

File	Description
src/fabric_cli/core/fab_constant.py	Registers the new deploy_bulk_publish_enabled config key, valid values, and default.
src/fabric_cli/commands/fs/deploy/fab_fs_deploy_config_file.py	Applies bulk publish feature flags (and warns) when the config setting is enabled.
requirements-dev.txt	Raises dev dependency minimum for fabric-cicd to support bulk import API.
pyproject.toml	Raises runtime dependency minimum for fabric-cicd to support bulk import API.
docs/essentials/settings.md	Documents the new config setting in the settings table.
docs/commands/fs/deploy.md	Adds “Bulk Publish (Experimental)” section with usage and notes.
.changes/unreleased/added-20260701-121400.yaml	Adds changelog entry for the new opt-in deploy setting.
tests/test_utils/test_fab_deploy_bulk_publish.py	Adds unit-style tests asserting the feature flags are appended (without VCR).
tests/test_commands/test_deploy.py	Adds an E2E test case verifying the flags are appended when config is enabled.
tests/test_commands/recordings/test_commands/test_deploy/test_deploy_multiple_items_bulk_publish_enabled_success.yaml	New VCR cassette for the new E2E scenario.
tests/test_commands/recordings/test_commands/test_deploy/class_setup.yaml	Updates recorded headers/values (User-Agent, timestamps, etc.) for the test class setup cassette.