Bumps the all-dependencies group with 2 updates:
[actions/upload-artifact](https://github.com/actions/upload-artifact)
and
[actions/download-artifact](https://github.com/actions/download-artifact).

Signed-off-by: dependabot[bot] <support@github.com>

#1234)

1. `ssl_disabled=True` → prohibit SSL
2. Any explicit SSL option set (`ssl`, `ssl_ca`, `ssl_cert`, `ssl_key`,
`ssl_key_password`, `ssl_verify_cert`, `ssl_verify_identity`) →
**REQUIRED**: raises `OperationalError(CR_SSL_CONNECTION_ERROR)` if the
server doesn't advertise `CLIENT.SSL`
3. No SSL options → **PREFERRED**: attempt SSL if the server supports
it, fall back to plain connection otherwise

Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>
Co-authored-by: Inada Naoki <songofacandy@gmail.com>

…#1235)

`Cursor.executemany()` fast-path parsing for `INSERT ... VALUES ... ON
DUPLICATE KEY UPDATE` did not accept MySQL 8.0.19+ alias syntax (`VALUES
(...) AS alias`), so these statements could miss bulk-insert
optimization. This updates the parser to recognize the newer syntax
while preserving existing behavior.

- **Regex update in `pymysql/cursors.py`**
  - Extend `RE_INSERT_VALUES` suffix parsing to accept:
    - optional `AS <row_alias>`
    - optional `AS <row_alias>(<col_alias>, ...)`
    - followed by optional `ON DUPLICATE ...`
- Keep existing `INSERT|REPLACE ... VALUES (...)` grouping semantics
used by `executemany()`.

- **Compatibility preserved**
- Existing legacy upsert style using `VALUES(col)` in `ON DUPLICATE KEY
UPDATE` remains supported.

- **Focused coverage in `pymysql/tests/test_cursor.py`**
  - Add regex assertions for:
    - `VALUES (...) AS new ON DUPLICATE KEY UPDATE ...`
    - `VALUES (...) AS new(c1,c2,...) ON DUPLICATE KEY UPDATE ...`
    - legacy `ON DUPLICATE KEY UPDATE ... VALUES(...)`

```python
m = pymysql.cursors.RE_INSERT_VALUES.match(
    "INSERT INTO t1 (a,b,c) VALUES (%s,%s,%s) AS new "
    "ON DUPLICATE KEY UPDATE c = new.a + new.b"
)
```

---------

Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>
Co-authored-by: methane <199592+methane@users.noreply.github.com>
Co-authored-by: Inada Naoki <songofacandy@gmail.com>

…on formatting (#1236)

MySQL ERR packets can include a 5-byte SQLSTATE, but PyMySQL currently
drops it when raising exceptions. This change preserves that protocol
metadata on the exception object while keeping the existing exception
args and string representation stable.

…`±Infinity`) (#1237)

PyMySQL already rejects non-finite `float` parameters before sending
SQL, but equivalent `decimal.Decimal` values were still serialized and
sent. This change aligns Decimal behavior with existing float safeguards
for unsupported non-finite numeric parameters.

- aligned docs Python requirement with package metadata (`CPython >=
3.9`)
- updated outdated DB-API/MySQL/Python links to current HTTPS URLs
- updated Sphinx intersphinx mapping to `https://docs.python.org/3`

- update `CHANGELOG.md` for `v1.2.0` release preparation
- add `Release date: TBD`
- add changelog entries for user-visible changes since `v1.1.3` (#1234,
#1235, #1236, #1237)

- Deprecate `db` and `passwd` again
- Remove deprecated error classes in Cursor class attributes.

…behavior (#1243)

`Connection.set_charset(charset)` was marked for future removal but did
not emit a deprecation signal at call time. This change adds runtime
deprecation signaling and updates release notes accordingly.