[server] Do not use progress bar when stdout is not a TTY Closes #5460552.

[wf] Fix Workflow.replace_state() Closes #5359131

[tags] add properly formated tags for 3.19 and 3.20 releases

[reledit] also check for cardinality before displaying the delete relation action. Closes #5334750

[schema] add a unique index on cwuri Closes #4985752

[web] move AbstractAuthManager near its immediate concrete subclass Related to #1381328.

[web] move abstract session manager to web/sessions Related to #1381328.

[repository] rename session -> cnx Related to #3933480.

[server/test] delete commented-out test Related to #3933480.

[connection] remove the `mode` attribute It is now unused. While removing mode, we also drop some sqlserver-specific reconnection logic snippets. These had several downsides: * untested * partial coverage * done at the wrong level Related to #2919309.

[connection] remove ensure_cnx_set context manager uses It has been deprecated in a previous changeset and is now a no-op. Related to #2919309.

[server] remove cnxset tracking, it is now unneeded Indeed, all cnxsets will now be acquired using the following API:: with session.new_cnx() as cnx: cnx.execute(...) # do stuff cnx.commit() These well-scoped blocks are the only place a cnxset can be acquired. The old use-case for un-delimited cnxsets (pyro/zmqpickle protocols) have been removed. The "mode" of connection objects becomes "write" forever (it will be removed in a couple of changesets). Related to #2919309.

[devtools] remove the remaining bw compat for old-style tests It is just: * dangerously untested right now * on the path of further bw compat removal (cnxset handling) webtest drops an apparently pointless .login call Related to #3933480.

[session] remove session-related bw compat code Related to #3933480.