fix: triage all 16 open GitHub issues — close 9, fix 6, comment 1

Batch 1 (closed): #43 spam, #34 dup, #19 resolved, #2 resolved, #41 answered
Batch 2: Added MIT LICENSE file (#35), closed #42 (license question)
Batch 3 code fixes:
  - #29: YouTube skip reason shows "0 results" instead of "not installed"
  - #30: Bird source mapping handles reddit-web + Bird combo
  - #39: watchlist.py extracts YouTube + TikTok findings, run-one prints output
  - #40: watchlist.py uses search_queries field when available
Batch 4:
  - #32: marketplace.json source "." → "./" with $schema ref
  - #36: commented with investigation plan ($ARGUMENTS forwarding)
  - #4: Added SSL troubleshooting section to README
Also commented on #22 (Bird features) and #31 (skills.sh audit).

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

LICENSE

@@ -0,0 +1,21 @@
+MIT License
+
+Copyright (c) 2026 Matt Van Horn
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.