* fix `make grpc` on new checkouts
* update proto files
* add some stub
* prototype with fake events
* notifying about events
* pass events
* events are being sent
* transfer headers to filters
* create the “filters” struct
* implement new heads
* PoC of New Heads subscription
* fix keep alive
* fixups for the client
* add “type” to the event
* support header event type on client
* better stage refactor
* fixup for the eth backend
* fixups
* fix tests
* fix tests
* fix linters
* address comments
* remove unused log
* save state
* save state
* save state
* refactoring
* fix
* save state
* save state
* fmt
* fix lint
* restore torrents for external downloader
* fix lint
* download
* skip debug test
* debug
* remote debug
* small cli fixes
* skip debug test
* external snapshot predownloader
* get rid of remote downloader
* fix lint
* clean makefile
* fix lint
* fix lint
* cleanup
* fix ci
* fmt
* remove proto from interfaces
* Squashed 'interfaces/' content from commit acd02bb94
git-subtree-dir: interfaces
git-subtree-split: acd02bb94c5a421aa8f8d1fd76cd8aad668e9fcb