fix(rust): Update palette crate to 0.7 for Fedora compatibility

[cfsmp3]

Summary

Fixes build failure on Fedora reported in #1954.

Problem

The palette crate renamed to_positive_degrees() to into_positive_degrees() in version 0.7.0. Fedora uses system-packaged Rust crates, which are at newer versions than what we had pinned in Cargo.toml.

error[E0599]: no method named `to_positive_degrees` found for struct `RgbHue<T>` in the current scope
  --> src/hardsubx/imgops.rs:15:22
   |
15 |     *H = hsv_rep.hue.to_positive_degrees();
   |                      ^^^^^^^^^^^^^^^^^^^

Changes

• Update palette dependency from 0.6.1 to 0.7
• Change method call from to_positive_degrees() to into_positive_degrees()

Test plan

• Build succeeds locally
• Fedora build should now succeed

🤖 Generated with Claude Code

[ccextractor-bot]

CCExtractor CI platform finished running the test files on linux. Below is a summary of the test results, when compared to test for commit 562de88...:

Report Name	Tests Passed
Broken	13/13
CEA-708	14/14
DVB	7/7
DVD	3/3
DVR-MS	2/2
General	25/27
Hardsubx	1/1
Hauppage	3/3
MP4	3/3
NoCC	10/10
Options	81/86
Teletext	21/21
WTV	13/13
XDS	34/34

NOTE: The following tests have been failing on the master branch as well as the PR:

• ccextractor --autoprogram --out=ttxt --latin1 --ucla dab1c1bd65..., Last passed:

  Test 7548

• ccextractor --out=srt --latin1 --autoprogram 29e5ffd34b..., Last passed:

  Test 7548

• ccextractor --startcreditstext "CCextractor Start crdit Testing" c4dd893cb9..., Last passed:

  Test 7548

• ccextractor --startcreditsnotbefore 1 --startcreditstext "CCextractor Start crdit Testing" c4dd893cb9..., Last passed:

  Test 7548

• ccextractor --startcreditsnotafter 2 --startcreditstext "CCextractor Start crdit Testing" c4dd893cb9..., Last passed:

  Test 7548

• ccextractor --startcreditsforatleast 1 --startcreditstext "CCextractor Start crdit Testing" c4dd893cb9..., Last passed:

  Test 7548

• ccextractor --startcreditsforatmost 2 --startcreditstext "CCextractor Start crdit Testing" c4dd893cb9..., Last passed:

  Test 7548

This PR does not introduce any new test failures. However, some tests are failing on both master and this PR (see above).

Check the result page for more info.

[ccextractor-bot]

CCExtractor CI platform finished running the test files on windows. Below is a summary of the test results, when compared to test for commit 562de88...:

Report Name	Tests Passed
Broken	13/13
CEA-708	14/14
DVB	6/7
DVD	3/3
DVR-MS	2/2
General	25/27
Hardsubx	1/1
Hauppage	3/3
MP4	3/3
NoCC	10/10
Options	80/86
Teletext	21/21
WTV	13/13
XDS	34/34

NOTE: The following tests have been failing on the master branch as well as the PR:

• ccextractor --autoprogram --out=srt --latin1 --quant 0 85271be4d2..., Last passed:

  Test 7549

• ccextractor --autoprogram --out=ttxt --latin1 --ucla dab1c1bd65..., Last passed:

  Test 7549

• ccextractor --out=srt --latin1 --autoprogram 29e5ffd34b..., Last passed:

  Test 7549

• ccextractor --out=spupng c83f765c66..., Last passed:

  Test 7549

• ccextractor --startcreditstext "CCextractor Start crdit Testing" c4dd893cb9..., Last passed:

  Test 7549

• ccextractor --startcreditsnotbefore 1 --startcreditstext "CCextractor Start crdit Testing" c4dd893cb9..., Last passed:

  Test 7549

• ccextractor --startcreditsnotafter 2 --startcreditstext "CCextractor Start crdit Testing" c4dd893cb9..., Last passed:

  Test 7549

• ccextractor --startcreditsforatleast 1 --startcreditstext "CCextractor Start crdit Testing" c4dd893cb9..., Last passed:

  Test 7549

• ccextractor --startcreditsforatmost 2 --startcreditstext "CCextractor Start crdit Testing" c4dd893cb9..., Last passed:

  Test 7549

This PR does not introduce any new test failures. However, some tests are failing on both master and this PR (see above).

Check the result page for more info.