* Dont error in finality_target_with_longest_chain

Signed-off-by: Andrei Sandu <andrei-mihail@parity.io>

* fix

Signed-off-by: Andrei Sandu <andrei-mihail@parity.io>

* Add error flag

Signed-off-by: Andrei Sandu <andrei-mihail@parity.io>

* Add error flag in dispute-coordinator

Make sure to send errors to subsystems requesting data depending on missing session info

Signed-off-by: Andrei Sandu <andrei-mihail@parity.io>

* Scrape ancestors

Signed-off-by: Andrei Sandu <andrei-mihail@parity.io>

* fmt

Signed-off-by: Andrei Sandu <andrei-mihail@parity.io>

* fix

Signed-off-by: Andrei Sandu <andrei-mihail@parity.io>

* Fix naming

Signed-off-by: Andrei Sandu <andrei-mihail@parity.io>

* review feedback

Signed-off-by: Andrei Sandu <andrei-mihail@parity.io>

* fmt

Signed-off-by: Andrei Sandu <andrei-mihail@parity.io>

* 💬

 fixes

Signed-off-by: Andrei Sandu <andrei-mihail@parity.io>

* consume

Signed-off-by: Andrei Sandu <andrei-mihail@parity.io>

* fix tests

Signed-off-by: Andrei Sandu <andrei-mihail@parity.io>

* typo

Signed-off-by: Andrei Sandu <andrei-mihail@parity.io>

* review fixes

Signed-off-by: Andrei Sandu <andrei-mihail@parity.io>

* Bump scraped blocks LRU capacity

Signed-off-by: Andrei Sandu <andrei-mihail@parity.io>

* 🧯 🔥



Signed-off-by: Andrei Sandu <andrei-mihail@parity.io>

* remove prints

Signed-off-by: Andrei Sandu <andrei-mihail@parity.io>

* Increase scraped blocks cache size

Signed-off-by: Andrei Sandu <andrei-mihail@parity.io>

* more review fixes

Signed-off-by: Andrei Sandu <andrei-mihail@parity.io>

* another fix

Signed-off-by: Andrei Sandu <andrei-mihail@parity.io>

* fix target_ancestor

Signed-off-by: Andrei Sandu <andrei-mihail@parity.io>

* Scrape up to max finalized block

Signed-off-by: Andrei Sandu <andrei-mihail@parity.io>

* undo comment change

Signed-off-by: Andrei Sandu <andrei-mihail@parity.io>

* Limit ancestry lookup to last finalized block or
max finality lag

Signed-off-by: Andrei Sandu <andrei-mihail@parity.io>

* debug damage

Signed-off-by: Andrei Sandu <andrei-mihail@parity.io>