Salvage of PR #41284 onto current main. Relocates the last 9 inline messaging
adapters (+ satellites: telegram_network, feishu_comment/_rules/meeting_invite,
wecom_crypto, wecom_callback) from gateway/platforms/ into self-contained
bundled plugins under plugins/platforms/<x>/, discovered via the platform
registry. Strips the per-platform core touchpoints from gateway/run.py,
gateway/config.py, hermes_cli/gateway.py, hermes_cli/setup.py, and
tools/send_message_tool.py.
Carries forward the migration fixes (explicit enabled:false honored,
get_connected_platforms forces discovery, plugin is_connected via
gateway.get_env_value, logs --component gateway matches plugins.platforms.*,
matrix hidden on Windows).
Additionally ports config keys main added since the PR base: the matrix
plugin's _apply_yaml_config now also covers allowed_users,
ignore_user_patterns, process_notices, and session_scope (the inline
gateway/config.py matrix block gained these in the 1340 commits the PR sat
open; they would otherwise have been silently dropped on deletion).
`BasePlatformAdapter.send_multiple_images` passes `metadata=metadata` to
`send_image` / `send_image_file` / `send_animation` on every send. The
WhatsApp and email `send_image` overrides stopped their signature at
`reply_to`, so any image delivered as a URL (the common case — image-gen
backends return URLs) raised:
TypeError: send_image() got an unexpected keyword argument "metadata"
and the image silently failed to send. Their sibling overrides
(`send_image_file` / `send_video` / `send_voice` / `send_document`)
already absorb it via **kwargs, which is why only plain image-URL sends
broke.
- whatsapp/email `send_image`: accept `metadata` (matches the base
signature); WhatsApp forwards it to the super() text fallback.
- Add `tests/gateway/test_media_metadata_contract.py`: asserts WhatsApp +
email accept it, plus a best-effort sweep over every adapter so the next
slip fails at test time instead of in production.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
