chore: fix CHANGELOG for 0.1.2 — correct entries based on actual main diff

Removed incorrectly listed items that are NOT in main:
- apc skill remove / apc unsync (PR #72 was merged into a feature branch,
  not main)
- Windsurf/Copilot native sync support (same)
- --target/-t removal from apc install (same)

Added missing items that ARE in main since v0.1.1:
- Security fixes: input validation, chmod 600 MCP configs, scrub secrets
  from export (#27,#28,#30 via #50; #32,#35 via #52)
- Bug fixes: LLM write guard, expanduser paths, Copilot absolute paths
  (#37,#38-#43,#42 via #53; #36,#45 via #54)
- Fix: ~/.apc/skills/ always created after apc install
- Fix: --version reads from importlib.metadata
- Docs: README shell completion, CLI basics (#23,#26 via #67)

Author: forge-fz2000

CHANGELOG.md

@@ -5,15 +5,18 @@
 ### Added
 - `apc collect --dry-run` — preview what would be collected without writing to cache (#25)
 - `apc sync --dry-run` enhanced to show exact file paths per tool (#24)
-- `apc memory list` rewritten as Rich tables with `--tool` filter (#21)
-- `apc memory remove` command — remove by ID prefix, by tool, or clear all (#48)
-- `apc skill remove` and `apc unsync` commands for full lifecycle management (#71)
-- Windsurf and GitHub Copilot native sync support (#71)
-- Gemini CLI skill directory symlink support (#71)
+- Shell completion setup for bash, zsh, and fish documented (#23)
 
 ### Fixed
-- Skills now propagate to all synced tools unconditionally after `apc install` (#71)
-- `--target`/`-t` removed from `apc install` (skills always land in `~/.apc/skills/`) (#71)
+- Input validation on `apc install`: repo/branch allowlisted, skill names sanitized on import, no redirect following (#27, #28, #30)
+- MCP config files now written with chmod 600; secrets scrubbed from `apc export` archives (#32, #35)
+- LLM memory write guard narrowed; paths with `~/` now correctly resolved; Copilot paths made absolute (#37, #38–#43, #42)
+- Memory deduplication uses stable content-hash key; `apc memory add` entries use new schema (#36, #45)
+- `~/.apc/skills/` directory always created after `apc install` even if no skills are fetched
+- CLI `--version` now reads from `importlib.metadata` instead of a hardcoded string
+
+### Docs
+- README: `apc --version`, shell completion setup, CLI basics section (#23, #26)
 
 
 ## v0.1.0 — Initial Release