chore(cli): deprecate soul remember in favor of soul note (phase 2 #231)

[AnshulPatil2005]

Summary

This PR covers only Phase 2 of #231 and targets dev (where Phase 1 was already merged in #233).

Changes

• Add DeprecationWarning when soul remember is invoked, pointing to soul note <path> <fact>.
• Print a CLI deprecation notice with --no-dedup guidance for callers that need raw append behavior.
• Update CLI reference text for soul remember to mark it deprecated and point to soul note.
• Add a README quickstart example using soul note.
• Add a CLI test assertion that remember output includes deprecation messaging.

Out of scope

• No Phase 1 reimplementation (already in feat(memory): add Soul.note() and 'soul note' CLI for dedup-aware writes (#231) #233).
• No command removal (Phase 3).
• No paw-workspace hook changes in this repo.

Validation

• PYTHONPATH=src pytest tests/test_cli/test_cli.py -k remember_command -q
• PYTHONPATH=src python -m py_compile src/soul_protocol/cli/main.py tests/test_cli/test_cli.py

Refs #231

[AnshulPatil2005]

once this is done i can move to phase 3

[prakashUXtech]

Phase 2 is scoped tightly and the doc updates landed in both places (cli-reference + README) so nothing drifted.

Four small things to land before this merges:

1. CHANGELOG entry. Add a line under ## Deprecated in CHANGELOG.md so 0.4.x → 0.5.0 upgraders see this called out.

2. Removal horizon in the deprecation message. The warning says "use soul note instead" but doesn't say when remember actually goes away. Pick a target version (something like "scheduled for removal in 0.7.0") and put it in both the warning text and the docs section. Without a horizon, deprecations linger indefinitely.

3. Docs section header. Change ### \soul remember`to### `soul remember` (deprecated)indocs/cli-reference.md` so the TOC reflects the state, not just the body text.

4. Test sharpening (optional). The existing test asserts the deprecation text appears. Also assert result.exit_code == 0 and that the memory actually got stored, so the test verifies "warns AND still works" rather than just "warns."

Two style notes for your own reference:

• stacklevel=2 is correct, but inside a Click command it doesn't point anywhere useful (the caller is Click internals, not user code). It's a no-op here, not wrong.
• The console.print + warnings.warn double-notification looks redundant but is actually right. Python silences DeprecationWarning from __main__ by default, so the console.print is what most CLI users will see.

Approving once the CHANGELOG + horizon are in. Good Phase 2 close.

[AnshulPatil2005]

Phase 2 is scoped tightly and the doc updates landed in both places (cli-reference + README) so nothing drifted.

Four small things to land before this merges:

1. CHANGELOG entry. Add a line under ## Deprecated in CHANGELOG.md so 0.4.x → 0.5.0 upgraders see this called out.
2. Removal horizon in the deprecation message. The warning says "use soul note instead" but doesn't say when remember actually goes away. Pick a target version (something like "scheduled for removal in 0.7.0") and put it in both the warning text and the docs section. Without a horizon, deprecations linger indefinitely.
3. Docs section header. Change ### \soul remember``to### soul remember` (deprecated)`in`docs/cli-reference.md` so the TOC reflects the state, not just the body text.
4. Test sharpening (optional). The existing test asserts the deprecation text appears. Also assert result.exit_code == 0 and that the memory actually got stored, so the test verifies "warns AND still works" rather than just "warns."

Two style notes for your own reference:

• stacklevel=2 is correct, but inside a Click command it doesn't point anywhere useful (the caller is Click internals, not user code). It's a no-op here, not wrong.
• The console.print + warnings.warn double-notification looks redundant but is actually right. Python silences DeprecationWarning from __main__ by default, so the console.print is what most CLI users will see.

Approving once the CHANGELOG + horizon are in. Good Phase 2 close.

Phase 2 is scoped tightly and the doc updates landed in both places (cli-reference + README) so nothing drifted.

Four small things to land before this merges:

1. CHANGELOG entry. Add a line under ## Deprecated in CHANGELOG.md so 0.4.x → 0.5.0 upgraders see this called out.
2. Removal horizon in the deprecation message. The warning says "use soul note instead" but doesn't say when remember actually goes away. Pick a target version (something like "scheduled for removal in 0.7.0") and put it in both the warning text and the docs section. Without a horizon, deprecations linger indefinitely.
3. Docs section header. Change ### \soul remember``to### soul remember` (deprecated)`in`docs/cli-reference.md` so the TOC reflects the state, not just the body text.
4. Test sharpening (optional). The existing test asserts the deprecation text appears. Also assert result.exit_code == 0 and that the memory actually got stored, so the test verifies "warns AND still works" rather than just "warns."

Two style notes for your own reference:

• stacklevel=2 is correct, but inside a Click command it doesn't point anywhere useful (the caller is Click internals, not user code). It's a no-op here, not wrong.
• The console.print + warnings.warn double-notification looks redundant but is actually right. Python silences DeprecationWarning from __main__ by default, so the console.print is what most CLI users will see.

Approving once the CHANGELOG + horizon are in. Good Phase 2 close.

on it