Filter work summary to remove non-xml safe characters (PP-1969)

[jonathangreen]

Description

Add some filtering to our set_summary function to filter out xml unsafe characters and add a DB migration to remove these characters from our existing database.

Motivation and Context

Seeing Exception in web app: All strings must be XML compatible: Unicode or ASCII, no NULL bytes or control characters in our logs.

Traceback (most recent call last):
  File "src/lxml/builder.py", line 161, in lxml.builder.ElementMaker.__init__.add_text
  File "src/lxml/etree.pyx", line 1202, in lxml.etree._Element.__getitem__
IndexError: list index out of range
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
  File "/var/www/circulation/env/lib/python3.10/site-packages/flask/app.py", line 880, in full_dispatch_request
    rv = self.dispatch_request()
  File "/var/www/circulation/env/lib/python3.10/site-packages/flask/app.py", line 865, in dispatch_request
    return self.ensure_sync(self.view_functions[rule.endpoint])(**view_args)  # type: ignore[no-any-return]
  File "/var/www/circulation/src/palace/manager/api/routes.py", line 120, in decorated
    return f(*args, **kwargs)
  File "/var/www/circulation/src/palace/manager/api/routes.py", line 93, in wrapped_function
    resp = make_response(f(*args, **kwargs))
  File "/var/www/circulation/src/palace/manager/core/app_server.py", line 87, in decorated
    v = f(*args, **kwargs)
  File "/var/www/circulation/src/palace/manager/core/app_server.py", line 163, in compressor
    return f(*args, **kwargs)
  File "/var/www/circulation/src/palace/manager/api/routes.py", line 239, in acquisition_groups
    return app.manager.opds_feeds.groups(lane_identifier)
  File "/var/www/circulation/src/palace/manager/api/controller/opds_feed.py", line 100, in groups
    return feed_class.groups(
  File "/var/www/circulation/src/palace/manager/feed/opds.py", line 64, in as_response
    serializer.serialize_feed(
  File "/var/www/circulation/src/palace/manager/feed/serializer/opds.py", line 102, in serialize_feed
    element = self.serialize_work_entry(entry.computed)
  File "/var/www/circulation/src/palace/manager/feed/serializer/opds.py", line 180, in serialize_work_entry
    entry.append(OPDSFeed.E("summary", feed_entry.summary.text))
  File "src/lxml/builder.py", line 221, in lxml.builder.ElementMaker.__call__
  File "src/lxml/builder.py", line 163, in lxml.builder.ElementMaker.__init__.add_text
  File "src/lxml/etree.pyx", line 1065, in lxml.etree._Element.text.__set__
  File "src/lxml/apihelpers.pxi", line 749, in lxml.etree._setNodeText
  File "src/lxml/apihelpers.pxi", line 737, in lxml.etree._createTextNode
  File "src/lxml/apihelpers.pxi", line 1530, in lxml.etree._utf8
ValueError: All strings must be XML compatible: Unicode or ASCII, no NULL bytes or control characters

Looking at the data in our database, these are only coming in via the Enki integration, but it seemed like a good idea to make sure they can't make it in though any integration.

How Has This Been Tested?

• Tested locally
• Running unit tests

Checklist

• I have updated the documentation accordingly.
• All new and existing tests passed.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 91.09%. Comparing base (102e9f6) to head (5f2130c).

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #2198   +/-   ##
=======================================
  Coverage   91.09%   91.09%           
=======================================
  Files         363      363           
  Lines       41248    41254    +6     
  Branches     8839     8842    +3     
=======================================
+ Hits        37575    37581    +6     
  Misses       2406     2406           
  Partials     1267     1267           

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.