feat(job-scraper): per-portal enabled toggle honored by /scrape (#160)

Implements the mechanism approved in discussion #93: enabled: true|false frontmatter on portal skills (missing key = enabled), honored during /scrape portal discovery, with skipped portals reported visibly in the run summary.

.agents/skills/freehire-search/SKILL.md

@@ -11,6 +11,7 @@ description: >
   jobs, engineering vacancies, data/ML jobs, DevOps roles, remote developer jobs,
   "are there any <tech role> jobs in <place>", look up this freehire job posting.
 context: fork
+enabled: true  # set to false to keep this portal installed but have /scrape skip it
 allowed-tools: Bash(bun run .agents/skills/freehire-search/cli/src/cli.ts *)
 ---
 

.agents/skills/jobbank-search/SKILL.md

@@ -19,6 +19,7 @@ description: >
   jobbank søgning, find stilling, data scientist job, software developer job,
   projektleder stilling, konsulent job, data analyse job.
 context: fork
+enabled: true  # set to false to keep this portal installed but have /scrape skip it
 allowed-tools: Bash(bun run .agents/skills/jobbank-search/cli/src/cli.ts *)
 ---
 

.agents/skills/jobdanmark-search/SKILL.md

@@ -17,6 +17,7 @@ description: >
   work in denmark, employment denmark, job denmark, jobs near me denmark,
   apprentice denmark, internship denmark, part-time denmark, full-time denmark.
 context: fork
+enabled: true  # set to false to keep this portal installed but have /scrape skip it
 allowed-tools: Bash(bun run .agents/skills/jobdanmark-search/cli/src/cli.ts *)
 ---
 

.agents/skills/jobindex-search/SKILL.md

@@ -17,6 +17,7 @@ description: >
   hiring denmark, job listings denmark, python jobs denmark, grafisk designer job,
   data engineer job, softwareudvikler job, full stack developer job danmark.
 context: fork
+enabled: true  # set to false to keep this portal installed but have /scrape skip it
 allowed-tools: Bash(bun run .agents/skills/jobindex-search/cli/src/cli.ts *)
 ---
 

.agents/skills/jobnet-search/SKILL.md

@@ -18,6 +18,7 @@ description: >
   social worker job denmark, occupation search denmark, esco occupation, job deadline,
   ansøgningsfrist, søg efter job, full time job denmark, part time job denmark.
 context: fork
+enabled: true  # set to false to keep this portal installed but have /scrape skip it
 allowed-tools: Bash(bun run .agents/skills/jobnet-search/cli/src/cli.ts *)
 ---
 

.agents/skills/linkedin-search/SKILL.md

@@ -11,6 +11,7 @@ description: >
   positions open, remote jobs, "are there any X jobs in <place>", look up this
   job posting.
 context: fork
+enabled: true  # set to false to keep this portal installed but have /scrape skip it
 allowed-tools: Bash(bun run .agents/skills/linkedin-search/cli/src/cli.ts *)
 ---