Add Organizational event logging feature

This PR adds event/audit logging support for organizations.
By default this feature is disabled, since it does log a lot and adds
extra database transactions.

All events are touched except a few, since we do not support those
features (yet), like SSO for example.

This feature is tested with multiple clients and all database types.

Fixes #229

src/util.rs

@@ -456,10 +456,13 @@ pub fn get_env_bool(key: &str) -> Option<bool> {
 
 use chrono::{DateTime, Local, NaiveDateTime, TimeZone};
 
+// Format used by Bitwarden API
+const DATETIME_FORMAT: &str = "%Y-%m-%dT%H:%M:%S%.6fZ";
+
 /// Formats a UTC-offset `NaiveDateTime` in the format used by Bitwarden API
 /// responses with "date" fields (`CreationDate`, `RevisionDate`, etc.).
 pub fn format_date(dt: &NaiveDateTime) -> String {
-    dt.format("%Y-%m-%dT%H:%M:%S%.6fZ").to_string()
+    dt.format(DATETIME_FORMAT).to_string()
 }
 
 /// Formats a `DateTime<Local>` using the specified format string.
@@ -500,6 +503,10 @@ pub fn format_datetime_http(dt: &DateTime<Local>) -> String {
     expiry_time.to_rfc2822().replace("+0000", "GMT")
 }
 
+pub fn parse_date(date: &str) -> NaiveDateTime {
+    NaiveDateTime::parse_from_str(date, DATETIME_FORMAT).unwrap()
+}
+
 //
 // Deployment environment methods
 //