Fold in the #40715 blank-env OOM fix on top of the host-resolution change:
- connect() now sets a non-retryable fatal error when required settings are
missing, so the gateway stops reconnecting against an empty host instead of
looping forever and leaking memory until the host OOM-kills.
- check_email_requirements() treats blank/whitespace-only EMAIL_* values as
missing, so an abandoned setup with empty keys no longer enables the platform.
Credits the parallel fixes by zerone0x (#40745) and liuhao1024 (#40829).
The email adapter read address/host purely from env vars and never stripped
them, so a missing or whitespace-padded EMAIL_IMAP_HOST reached
imaplib.IMAP4_SSL("") and surfaced as the misleading
"[Errno 8] nodename nor servname provided, or not known" — sending users down a
DNS rabbit hole when the real problem was an empty/dirty host string. A
config.yaml-only setup also left the host empty because __init__ ignored
PlatformConfig.extra, even though the "connected" check, the send helper, and
`hermes config show` already read address/imap_host/smtp_host from it.
Resolve address/imap_host/smtp_host from the env var first, then fall back to
config.extra, and strip surrounding whitespace — matching the send helper's
existing pattern. Validate the required settings at the start of connect() and
return False with an actionable message instead of attempting a connection with
an empty host.
Adds regression tests for whitespace stripping, config.extra fallback, and the
no-IMAP-attempt-on-missing-host path.
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).
