Downgrade boto3

[amandahla]

Overview

Synapse backup fails with error:

An error occurred (MissingContentLength) when calling the PutObject operation: Unknown\n"

As per this comment, downgrading boto could be a temporary solution
boto/boto3#4398 (comment)

Rationale

Fix backup actions.

Juju Events Changes

Module Changes

Library Changes

Checklist

• The charm style guide was applied
• The contributing guide was applied
• The changes are compliant with ISD054 - Manging Charm Complexity
• The documentation for charmhub is updated.
• The PR is tagged with appropriate label (urgent, trivial, senior-review-required)
• The changelog is updated with changes that affect the users of the charm.

No changelog required.

[github-actions]

Test results for commit 8e9467a

Test coverage for 8e9467a

Name                                    Stmts   Miss Branch BrPart  Cover   Missing
-----------------------------------------------------------------------------------
src/actions/__init__.py                     1      0      0      0   100%
src/actions/register_user.py               21      0      2      0   100%
src/admin_access_token.py                   9      0      0      0   100%
src/backup.py                             175      5     20      2    96%   353-354, 423-424, 481->483, 484
src/backup_observer.py                    134     16     12      0    89%   132-135, 140-143, 179-182, 211-214
src/charm.py                              288     18     70     10    92%   135->137, 140, 246, 250-251, 279-280, 308, 315, 396-400, 403-404, 432-434, 454, 490-491
src/charm_state.py                        158      9     34      7    92%   271, 275, 296, 321, 327, 333, 337-338, 425
src/charm_types.py                         34      0      0      0   100%
src/database_client.py                     57      1      8      4    92%   35, 47->exit, 69->exit, 88->98
src/database_observer.py                   39      0      4      1    98%   70->72
src/exceptions.py                           3      0      0      0   100%
src/matrix_auth_observer.py                51      3      8      1    93%   61, 141-142
src/media_observer.py                      41      4      2      1    88%   61-63, 82
src/mjolnir.py                             97      3     30      3    95%   82, 91->107, 112-116
src/observability.py                       14      0      0      0   100%
src/pebble.py                             206     27     48     13    84%   57->62, 176->exit, 187-191, 225-226, 246-247, 300->305, 310-311, 323-324, 326-327, 345-346, 363, 365, 367, 369, 371, 399, 451-456
src/redis_observer.py                      35      3      4      0    92%   62-65
src/s3_parameters.py                       22      0      4      0   100%
src/saml_observer.py                       38      0      4      0   100%
src/smtp_observer.py                       56      4     14      2    91%   82-86, 89, 108->113
src/synapse/__init__.py                     4      0      0      0   100%
src/synapse/admin.py                       19      2      2      0    90%   40-41
src/synapse/api.py                        175      3     20      3    97%   176, 229, 402
src/synapse/workload.py                   138      6     24      0    94%   403-404, 414-417
src/synapse/workload_configuration.py     170     29     38     13    80%   95->exit, 99-100, 148-149, 178, 198-199, 231-232, 265, 274-275, 290, 295-296, 317-318, 337->342, 343, 361->363, 373-374, 390, 458-459, 487, 495->497, 497->499, 504-505, 525->532, 535, 555-556
src/user.py                                23      0      2      0   100%
-----------------------------------------------------------------------------------
TOTAL                                    2008    133    350     60    92%

Static code analysis report

Working... ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 100% 0:00:01
Run started:2025-05-02 14:47:47.499330

Test results:
  No issues identified.

Code scanned:
  Total lines of code: 11478
  Total lines skipped (#nosec): 4
  Total potential issues skipped due to specifically being disabled (e.g., #nosec BXXX): 0

Run metrics:
  Total issues (by severity):
  	Undefined: 0
  	Low: 0
  	Medium: 0
  	High: 0
  Total issues (by confidence):
  	Undefined: 0
  	Low: 0
  	Medium: 0
  	High: 0
Files skipped (0):